Senna

SupportADrangedscalingteamfightlane-bullypeel

Data861 pro games·Jan 2022 – Aug 2026·patches 12.2–26.16·CBLOL, First Stand, LCK, LCO Split, LCP, LCS, LEC, LJL, LLA, LPL, LTA, MSI, PCS, VCS, Worlds· incl. international·Browse source →

Comp identity — Support

Leans Protect — its strongest of the five comp axes.

Plays like — nearest pentagon

Ranked by how close their five-axis heatmap looks — role-agnostic.

Where it thrives (5-comp fit)

Protectworkable · 50%
Siegeworkable · 40%
Catchworkable · 30%
Senna can hold up a Protect plan — it keeps the hypercarry alive with peel and sustain — but a Protect-first shell gets more out of it (Protect 5/10 vs Protect 5/10).

Kit quirks

Q is a dual-purpose beam: the enemy-side ray damages and slows, the ally-side ray heals, meaning positioning determines whether she's healing or dealing damage on a given cast
Passive (Absolution) stacks Mist from marked-then-hit targets, converting into permanent AD/range/crit rather than a burst payoff, functioning as a scaling mechanic on a support
R is a global-range ability that both shields her whole team and deals damage, but is a slow, telegraphed beam rather than an instant peel tool

How Senna actually performs in ranked solo queue · 74 weighted games

Solo queue strength

Support53% WR · 70.4 games
Bot48% WR · 3.3 games
Top50% WR · 0.1 games

Strongest duos

Best matchups

No favored matchups recorded.

Hardest matchups

No losing matchups recorded.

Dragons & win rate

Win rate when Senna's team secured at least one of each drake, next to the all-champion rate in that same state. Teams that take dragons are usually already ahead, so every champ wins more with them — the honest read is the gap, i.e. whether Senna beats the average team that also has the drake. Single-drake samples are thin; treat small counts as suggestive.

Cloud65%vs 60% avg+5pp20g

Hextech67%vs 62% avg+5pp18g

Ocean72%vs 63% avg+9pp18g

Duo playbook

+ Tahm Kench (Bot/Support)
Tahm Kench's devour and reposition tools cover Senna's biggest weakness — no gap closer on a squishy frame — letting her play aggressively knowing he can pull her out of a bad fight; landing Senna's W also guarantees Tahm can follow with his own W for a clean chain-CC.
via Skill Capped ↗

Champion reference

Base stats and every ability with its per-rank values and ratios. Search all champions →

Senna (Senna Abaru) — The Redeemer

Class: Marksman, Enchanter
Resource: Mana
Range type: Ranged
Adaptive type: Physical
Positions: Bottom, Support
Released: 2019-11-10 (V9.22)
Last changed: V26.16
Price: 1,575 BE · 790 RP

Damage

Toughness

Control

Mobility

Utility

Difficulty

Base stats

Stat	Base	Per level	Level 18
Health	530	+89	2043
Health regen (per 5s)	3.5	+0.55	12.85
Mana	350	+45	1115
Mana regen (per 5s)	11.5	+0.7	23.4
Armor	25	+4	93
Magic resist	33	+1.1	51.7
Attack damage	50	—	50
Attack speed	0.625	+2.6%	0.802
Attack speed ratio	0.4
Attack range	600
Movement speed	330

Level 18 uses League's growth curve (base + 17 × per-level); attack speed grows as bonus % scaled by the attack speed ratio.

Advanced stats & game-mode balance

Acquisition radius: 800
Selection height: 170
Selection radius: 115
Pathing radius: 35
Critical strike damage modifier: 0.8
Windup modifier: 0.6
Attack cast time (s): 0.5
Attack total time (s): 1.6
Basic attack missile speed: 0

ARAM: damage dealt ×0.92 · damage taken ×1.05

One for All: damage dealt ×1.05 · damage taken ×0.9

Ultimate Spellbook: damage dealt ×1.1 · damage taken ×1 · healing ×1.2

URF: damage dealt ×1.1

Abilities

Passive

Absolution

Target immunity: 6 / 5 / 4 (based on level)Effect radius: 2000

Innate - Weakened Soul: Senna's basic attacks on-hit and abilities mark enemy champions hit for 4 seconds. Subsequent attacks or ability hits against marked targets will consume the mark to grant Senna a stack of Mist and deal bonus physical damage equal to 1% – 10% (based on level) of the target's current health, rendering the target immune to being marked again for a few seconds. This damage applies life steal at 100% effectiveness.

Innate: Enemies that die near Senna may spawn a Mist Wraith from their corpse. A Mist Wraith lasts 8 seconds and Senna can basic attack or hit it with Piercing Darkness or Dawning Shadow to kill it instantly, granting her 8 and a stack of Mist. Enemy champions and large monsters will spawn a Mist Wraith. Epic monsters will spawn 2 Mist Wraiths. Minions and lesser monsters that Senna kills have a 5% chance to spawn a Mist Wraith. Large minions that Senna does not kill will always spawn a Mist Wraith, while lesser minions and lesser monsters that Senna does not kill have a 32% chance to spawn one. Lesser minions executed by an allied champion's Support Quest item have a 8.4% chance to spawn a Mist Wraith.

Mist: For each stack of Mist, Senna gains 0.75 bonus attack damage. For every 20 stacks, she also gains 20 bonus attack range and 10% critical strike chance. Additionally, every 1% critical strike chance in excess of 100% is converted into 0.35% life steal.

Innate - Relic Cannon: Senna's basic attacks on-hit deal 20% AD bonus physical damage and grant her 10% / 15% / 20% (based on level) of the target's movement speed as bonus movement speed for 0.5 seconds. The damage applies life steal at 100% effectiveness.

Targeting input: PassiveAffects: Self, EnemiesDamage type: Proc damageDamage sub-types: PhysicalSpell shield: Not BlockedParries: See NotesProjectile: Blocked

Notes (27)

If a target's mark has a remaining duration less than 0.25 seconds, and Senna starts her basic attack windup on the target during this time, the mark's duration will be modified to 0.75 seconds. Subsequent windups on the marked target will refresh this modified duration if the previous attack windup did not complete.
Despite the damage text showing 1 to Mist Wraiths, attacking them will calculate the attack's damage (including critical strike modifiers) and any on-hit effects (including her Relic Cannon damage) for the purposes of life steal and drain effects.
Relic Cannon is only applied if the attack deals more than 0 damage.
Hence, it is not applied if the target is invulnerable or Senna's basic attack's attack damage is reduced to 0 or below.
The bonus damage is also not applied against structures (regardless of their vulnerability).
Dealing 0 damage is valid for marking and collecting Mist from champions, but dealing no damage at all is not.
Hence, Senna can mark and collect from invulnerable enemies.
Dodge prevents marking and collecting a Mist via Senna's basic attacks and Piercing Darkness.
PENDING FOR TEST:: Mist interaction with block and blind.
Mist traveling to Senna can be destroyed as a projectile.
Nunu & Willump spawn a wraith each.
Enemies will not see newly spawned wraiths while Senna is not visible.
A wraith can be hit by Bard's Cosmic Binding and it will interact with it the same way minions or monsters interact with Cosmic Binding but it will not take damage.
Mist Wraith has a spawn animation, but is targetable immediately.
Mist Wraith grants a small amount of sight around itself.
Runaan's Hurricane's Wind's Fury bolts will ignore Mist Wraiths.
Wind's Fury can still trigger if Mist Wraiths are the primary target.
Attacking a Mist Wraith will not consume Energized.
Excluding the range increase and the bonus shielding on Dawning Shadow, one stack of Mist is worth 46.25 ( +8 from Mist Wraith pickup ( 54.25 total)), 35.62125 if the critical chance is converted to life steal.
0.75 AD is worth 26.25.
0.5% critical strike chance is worth 20.
0.175% life steal is worth 9.37125.
The bonus on-hit damage applies an additional stack of Black Cleaver's Carve.
Critical strike chance gained from Yun Tal Wildarrows' Practice Makes Lethal, Augments and Stat bonuses do not interact with the life steal conversion.(bug)
The buff will be granted even when hitting units that have zero movement speed (from which Senna cannot gain any movement speed).
Attacking structures is special-cased to not grant it at all, however.
Pinging Absolution in the HUD will send a chat message to the team that displays its stack count and her total attack range accumulated.

Tips & tricks (1)

At high enough attack speed, and assuming Senna is at her max attack range when killing a unit that spawns a Mist Wraith, she can collect it before they leave her attack range at all.

Map-specific differences (6)

Mist Wraith gold earned is ignored by the Swiftplay-specific bounty comeback system.
Wraiths are not shared.
Weakened Soul debuff application is individually tracked and does not interact among multiple users.
New Effect: Gains 7.5 Mist stacks per round.
Senna's excess critical strike chance from Mist and items is converted to life steal, which means it does not affect Sword of the Divine's Exorciate.(unexpected)
The global Arena Stat Adjustments buff does not convert Senna's excess critical strike chance to adaptive force.(bug)

Piercing Darkness

Cost: 70 / 80 / 90 / 100 / 110 ManaCooldown: 15Cast time: 80% of Senna's windup time (0.4 at base attack speed)Target range: 600 – 1100Range: 1300Width: 100 • 280

Active: Senna fires a beam in the direction of the target unit. The beam consists of a wider ray of light, and a narrower ray of shadow at the center. The shadow ray deals physical damage to enemies hit and slows them by 15% (+ 15% per 100 bonus AD) (+ 7% per 100 AP) for a duration. The damage dealt to enemy champions applies life steal at 100% effectiveness.

Physical Damage: 30 / 55 / 80 / 105 / 130 (+ 60% bonus AD)
Slow Duration: 1 / 1.25 / 1.5 / 1.75 / 2 seconds

The light ray heals Senna and allied champions hit.

Healing: 40 / 60 / 80 / 100 / 120 (+ 40% bonus AD) (+ 35% AP)

Piercing Darkness is considered to trigger a single basic attack against turrets, wards, jungle plants, Mist Wraiths and any other attack-interactive units hit. It also applies on-hit effects against champions and turrets hit, and triggers on-attack effects against one champion hit.

Piercing Darkness' current cooldown is reduced by 1 second on-attack.

Targeting input: UnitTarget out-of-range override: Walk in range of the target unit to castAffects: Allies, Enemies, Turrets, WardsDamage type: See NotesDamage sub-types: PhysicalSpell shield: See NotesParries: MissingProjectile: Not Blocked

Notes (15)

Applies spell damage to the same champion it applies on-attack effects to and area damage to all other targets.
The ability's cast time respects the attack speed floor and cap.
Hail of Blades will spend a stack on hitting a champion with Piercing Darkness but only if Hail of Blades was activated first by an auto-attack.
Senna can generally target anything that is not either explicitly untargetable or herself.
Valid targets include anything that can be targeted by a basic attack from someone.
Piercing Darkness respects all turret-specific rules when striking them.
On-hit effects are applied in order of struck units' spawn IDs. This matters for effects that are consumed on-hit (e.g. Spellblade), which are applied to the target with the lowest Spawn ID.
"Spawn ID" is an unofficial abbreviation to describe the spawn order for all units at the start of a game, below are some examples.
If Senna targets an enemy champion but hits at least one more enemy champion simultaneously, Press the Attack's first stack will be applied to that target. If no champion was targeted, it will default to the champion with the lowest Spawn ID out of the ones struck by the ability. Whether the effect stacks up on a champion or not when multiple enemy champions are stuck also depends on Spawn ID.
If Piercing Darkness struck an enemy champion and turret simultaneously, with Rapid Firecannon fully charged, the passive effect will most likely trigger on the turret since towers are often spawned before champions.
Similarly, on-attack effects are applied in order of struck champions' spawn IDs. However, there are some specific on-attack effects that will apply to both the target of Piercing Darkness and the target with the lowest Spawn ID if the two unit is not identical.(unexpected) Confirmed cases:
Energized effects are stacked twice the amount.
PENDING FOR TEST:
Spell shield will not prevent on-hit effects from being applied.
PENDING FOR TEST: Piercing Darkness interaction with dodging, blocking, and blinding effects.

Tips & tricks (5)

Because Senna's windup percent scales down with levels but her windup time also only scales with 60% of attack speed bonuses, the precise numbers get complicated quickly.
At base attack speed and level 1, Senna's attack windup is 0.5 seconds.
A reduced formula for calculating Piercing Darkness' cast time at a given attack timer is 80% of [ 0.5 + 0.1875 × (1 ÷ total attack speed − 1 ÷ 0.5) ] seconds.
The cast time equals 0.264 seconds (which is the standard for most abilities in League of Legends) at approximately 204.3% bonus attack speed (as of V25.10).
Reducing Senna's attack speed via attack speed reductions also increases Piercing Darkness' cast time by 60% of the amount.

Map-specific differences (2)

Heal AP ratio changed to 80% AP.
Slow AP ratio changed to 15% per 100 AP.

Last Embrace

Cost: 50 / 55 / 60 / 65 / 70 ManaCooldown: 11Cast time: 0.25Target range: 1300Effect radius: 280Width: 140Speed: 1200Queue threshold: 0.5

Active: Senna throws a globule of Black Mist in the target direction that deals physical damage to the first enemy hit and attaches to them for 1 second.

Physical Damage: 70 / 110 / 150 / 190 / 230 (+ 90% bonus AD)

After the duration or when the target dies, the Black Mist spreads out of the target, rooting them and surrounding enemies for a few seconds.

Root Duration: 1.25 / 1.5 / 1.75 / 2 / 2.25 seconds

Targeting input: DirectionAffects: EnemiesDamage type: Ability damageDamage sub-types: PhysicalSpell shield: BlockedProjectile: Blocked

Notes (2)

Last Embrace will not root the primary target if they are untargetable.
This ability will cast from wherever the caster is at the end of the cast time.

Curse of the Black Mist

Cost: 70 ManaCooldown: 26 / 24.5 / 23 / 21.5 / 20Cast time: 1Effect radius: 400Queue threshold: 0.5Detection radius: 400

Active: Senna shrouds herself in an aura of Black Mist and gains camouflage for a duration. If Senna breaks the camouflage, she regains it after 1.75 seconds without performing actions that break stealth.

Effect Duration: 6 / 6.5 / 7 / 7.5 / 8 seconds

Allied champions who enter the mist gain Wraith Form for a duration equal to the aura's remaining duration.

Wraith Form: Gain camouflage. Enemies are granted obscured vision of camouflaged Wraiths moving outside the mist within their line of sight. Wraith Form can be regained if lost by breaking the camouflage after 1.75 seconds without performing actions that break stealth. Wraith Form ends immediately upon Senna's death.

Senna and allies camouflaged by Curse of the Black Mist also gain 20% (+ 5% per 100 AP) bonus movement speed.

Senna can move during Curse of the Black Mist's cast time.

Targeting input: AutoAffects: Self

Notes (13)

Allies affected by the Curse of the Blast Mist aura receive a buff called Cloak of Mist.
Obscured units appear as Wraiths, hence the name. The wraith model does not distinguish which champion is obscured.
On the mini-map, obscured champions will be displayed as wraith icons instead of champion icons to the enemy team.
In-game, the 'Cloak of Mist' buff grants camouflage and the 'Wraith Form' buff obscures the unit and grants movement speed. However, 'Cloak of Mist' has the unspecified effect of negating the obscuring effects of 'Wraith Form' (i.e. the unit is not a wraith while inside the mist); the unit has the bonus movement speed even when they are not a wraith (e.g. inside the mist or an enemy is nearby); and 'Wraith Form' also grants the functionality of camouflage (i.e. the unit is treated as a camouflaged unit with regards to True Sight, Control Wards, and enemy champions).
Given this overly complex interaction between the two buffs granted as well as the overlapping effects, it is easier to describe the effects as a single buff that is modified in specific circumstances rather than trying to establish a new game mechanic.
Senna likewise has her aura buff and the 'Wraith Form' buff, but her 'Wraith Form' does not share gameplay functionality with other allies benefiting from Wraith Form. For Senna, the appearance of being a wraith is a form-swap while camouflaged (similar to Evelynn's Demon Shade). Senna will remain in her wraith form when she is detected so long as the camouflage effect isn't broken, and her wraith's appearance is very distinct from other wraiths.
Allied champions who enter the mist and have stealth of their own will still gain the Wraith Form buff but they will not grant obscured vision of themselves to the enemy while out of the mist nor will they appear as a Wraith.
Allies who have their own camouflage and also have Wraith Form will be revealed to enemies from their stealth's detection range, not Wraith Form's.
If Senna gains invisibility while camouflaged by Curse of the Black Mist, the visual effects of her aura will be hidden while she is invisible.
Curse of the Black Mist will not activate if Senna enters resurrection during the cast time.
Wraith Form will not be granted to allies that are in a zombie state or are channeling. It will be granted to allies even if they are untargetable.
Using a basic attack breaks the stealth at the start of the attack windup.
The stealth regain timer is refreshed from basic attacks at the start of their attack windup.

Tips & tricks (4)

Because of its duration, Curse of the Black Mist can be utilized in conjunction with Homeguard when exiting the base, and importantly early in the lane.
This is at the cost of mana, some of which will regenerate during the walk. Mana is consumed upon finishing the cast, so alternatively the caster can remain in base to regenerate some or all of the amount incurred, though delaying the journey back to lane.
To maximize the distance covered, due to movement speed caps, use the ability when Homeguard's movement speed has dropped approximately below 500. This will allow Senna and any allies following her to keep a form of haste for a particularly long time.
The haste and stealth combination can be highly effective in initiating ambushes from Fog of War, since the number of teammates concealed can be difficult to discern.

Map-specific differences (1)

Movement speed AP ratio changed to 7% per 100 AP.

Dawning Shadow

Cost: 100 ManaCooldown: 140 / 120 / 100Cast time: 1Target range: GlobalWidth: 320 • 2400Speed: 20000Queue threshold: 0.5

Active: Senna fires a massive beam in the target direction. The beam consists of a broad wave of light, and a narrow wave of shadow at the center.

The shadow wave deals physical damage to enemy champions hit and reveals them for 3 seconds, as well as hits all Mist Wraiths.

Physical Damage: 250 / 400 / 550 (+ 115% bonus AD) (+ 70% AP)

The light wave grants a shield to Senna and allied champions hit for 3 seconds, and grants sight of the area along the path for 2 seconds.

Shield Strength: 120 / 160 / 200 (+ 50% AP) (+ 150% Mist)

Targeting input: DirectionAffects: Self, Allies, EnemiesDamage type: Area damageDamage sub-types: PhysicalSpell shield: BlockedProjectile: Blocked

Notes (4)

The broad wave is a singular projectile that can be destroyed.
The narrow wave will be destroyed with it in the process.
This ability will cast from wherever the caster is at the start of the cast time.
Senna reveals herself during the cast time.

Tips & tricks (1)

On Summoner's Rift, Dawning Shadow will take approximately 0.9 seconds to land if fired from Nexus to Nexus or from the midpoint of bot lane to the midpoint of toplane.

Map-specific differences (1)

Shield AP ratio changed to 70% AP.

Stats and abilities from the League of Legends Wiki (CC BY-SA 3.0), built for patch 26.22.

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Passive

Absolution

Target immunity: 6 / 5 / 4 (based on level)Effect radius: 2000

Targeting input: PassiveAffects: Self, EnemiesDamage type: Proc damageDamage sub-types: PhysicalSpell shield: Not BlockedParries: See NotesProjectile: Blocked

Notes (27)

If a target's mark has a remaining duration less than 0.25 seconds, and Senna starts her basic attack windup on the target during this time, the mark's duration will be modified to 0.75 seconds. Subsequent windups on the marked target will refresh this modified duration if the previous attack windup did not complete.
Despite the damage text showing 1 to Mist Wraiths, attacking them will calculate the attack's damage (including critical strike modifiers) and any on-hit effects (including her Relic Cannon damage) for the purposes of life steal and drain effects.
Relic Cannon is only applied if the attack deals more than 0 damage.
Hence, it is not applied if the target is invulnerable or Senna's basic attack's attack damage is reduced to 0 or below.
The bonus damage is also not applied against structures (regardless of their vulnerability).
Dealing 0 damage is valid for marking and collecting Mist from champions, but dealing no damage at all is not.
Hence, Senna can mark and collect from invulnerable enemies.
Dodge prevents marking and collecting a Mist via Senna's basic attacks and Piercing Darkness.
PENDING FOR TEST:: Mist interaction with block and blind.
Mist traveling to Senna can be destroyed as a projectile.
Nunu & Willump spawn a wraith each.
Enemies will not see newly spawned wraiths while Senna is not visible.
A wraith can be hit by Bard's Cosmic Binding and it will interact with it the same way minions or monsters interact with Cosmic Binding but it will not take damage.
Mist Wraith has a spawn animation, but is targetable immediately.
Mist Wraith grants a small amount of sight around itself.
Runaan's Hurricane's Wind's Fury bolts will ignore Mist Wraiths.
Wind's Fury can still trigger if Mist Wraiths are the primary target.
Attacking a Mist Wraith will not consume Energized.
Excluding the range increase and the bonus shielding on Dawning Shadow, one stack of Mist is worth 46.25 ( +8 from Mist Wraith pickup ( 54.25 total)), 35.62125 if the critical chance is converted to life steal.
0.75 AD is worth 26.25.
0.5% critical strike chance is worth 20.
0.175% life steal is worth 9.37125.
The bonus on-hit damage applies an additional stack of Black Cleaver's Carve.
Critical strike chance gained from Yun Tal Wildarrows' Practice Makes Lethal, Augments and Stat bonuses do not interact with the life steal conversion.(bug)
The buff will be granted even when hitting units that have zero movement speed (from which Senna cannot gain any movement speed).
Attacking structures is special-cased to not grant it at all, however.
Pinging Absolution in the HUD will send a chat message to the team that displays its stack count and her total attack range accumulated.

Tips & tricks (1)

At high enough attack speed, and assuming Senna is at her max attack range when killing a unit that spawns a Mist Wraith, she can collect it before they leave her attack range at all.

Map-specific differences (6)

Mist Wraith gold earned is ignored by the Swiftplay-specific bounty comeback system.
Wraiths are not shared.
Weakened Soul debuff application is individually tracked and does not interact among multiple users.
New Effect: Gains 7.5 Mist stacks per round.
Senna's excess critical strike chance from Mist and items is converted to life steal, which means it does not affect Sword of the Divine's Exorciate.(unexpected)
The global Arena Stat Adjustments buff does not convert Senna's excess critical strike chance to adaptive force.(bug)