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Abilities

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Basic Attack
ATTACK RANGE: 600
SPEED: N/A
Basic Attack

Basic Attack: Senna blasts her target with her relic cannon, dealing 100% AD physical damage and applying on-hit effects. This attack does not use a Projectile projectile.

Senna's basic attacks can Critical strike icon critically strike, but they only deal 130% (+ Infinity Edge item 16.25%) AD physical damage.

Senna's Attack speed icon attack speed benefits from only 20% of her total Attack speed icon bonus attack speed (instead of 62.5%) and the attack's windup time is only reduced by 60% of the expected value given attack speed bonuses.

Senna's attack windup is reduced「 by 0% − 30% (based on level). 」「 to 31.25% − 21.875% (based on level). 」

Info
Notes
  • At level 18, only with the per level bonus attack speed, Senna will have 0.761 attack speed, and will take 0.31247042749249 seconds to perform an attack compared to 0.5 seconds at level 1.

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Absolution
ON-TARGET COOLDOWN: 6 / 5 / 4 (based on level)
Absolution

Innate - Weakened Soul: Senna's basic attacks on-hit and damaging abilities on enemy champions apply Mist for 4 seconds, refreshed to 0.75 seconds if Senna starts winding up a basic attack on them. If Senna applies Mist to the same target twice, she collects it, dealing 1% − 16% (based on level) of target's current health as bonus physical damage, and making the target immune to further Mist applications for a few seconds.

MistWraithSquare

Enemy units that die near Senna have a chance to spawn a Mist Wraith for 8 seconds, increased to 2 Mist Wraiths for epic monsters. Senna can basic attack a Mist Wraith to destroy it, gaining Gold 3 and collecting its Mist.

Innate - Absolution: Each stack of Mist grants Senna Attack damage icon 0.75 bonus attack damage. For every 20 stacks, Senna also gains Range icon 25 bonus range and Critical strike chance icon 15% critical strike chance. Upon exceeding 100% critical strike chance, Senna converts 35% of the excess into Life steal icon life steal.

Absolution 2

Innate - Relic Cannon: Senna's basic attacks deal 20% AD bonus physical damage on-hit and grant 10 / 15 / 20% of the target's movement speed as Movement speed icon bonus movement speed for 0.5 seconds on-hit.

Info
Notes
  • Despite Senna dealing 1 damage to Mist Wraiths, attacking them will calculate the attack's damage (including Critical strike icon critical strike modifiers) and any on-hit effects for the purposes of Life steal icon life steal and Ravenous Hunter rune drain effects.
    • Since Senna is not dealing more than 1 damage, effects such as Wit's End item Wit's End's passive will not trigger.
  • Counter Strike Dodge prevents from marking and collecting a Mist via Senna's basic attacks and Piercing Darkness Piercing Darkness.
    • PENDING FOR TEST: Mist interaction with Spirit's Refuge block and Blind icon blind.
  • Nunu OriginalSquare Nunu & Willump spawn a wraith each.
  • Enemies will not see newly spawned wraiths while Senna is not visible.
  • Minion icon Minions executed by allies with Spoils of War have a 8.33% chance to spawn wraiths.
  • A wraith can be hit by Cosmic Binding 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 icon sight around itself.
  • Runaan's Hurricane item Runaan's Hurricane secondary bolts will ignore Mist Wraiths.
  • Excluding the range increase, one stack of Mist values approx. Gold 40.5 (Gold +3 from Mist Wraith pickup). The bonuses have a gross value of Gold 56.25 (Gold 35.25 with life steal).
    • Attack damage icon 0.75 AD is worth Gold 26.25. Absolution effectively boosts basic attacks with 0.9 AD, making the value Gold 31.5.
    • Critical strike chance icon 0.75% critical strike chance is worth Gold 30. Absolution reduces its efficiency by 70%, making the value Gold 9.

Map-Specific Differences
Mirror Mode profileicon One for All differences:
  • Wraiths are not shared.
  • Weakened Soul debuff application is individually tracked and does not interact among multiple users.

Video
Senna - Passive

Senna - Passive

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Piercing Darkness
TARGET RANGE: Range model 600 − 1100 (based on Absolution Mist)
EFFECT RADIUS: Range model 1300
WIDTH: Range model 100 / 280
CAST TIME: 0.4-0.25
COST: 70 / 80 / 90 / 100 / 110 Mana
COOLDOWN: 15
Piercing Darkness

Active: Senna fires a spectral laser in the direction of the target unit, Heal power healing herself and allied Champion icon champions in a line, and dealing physical damage to enemies in a thinner line.

Healing:
40 / 60 / 80 / 100 / 120 (+ 40% bonus AD) (+ 25% AP)

Physical Damage:
40 / 70 / 100 / 130 / 160 (+ 40% bonus AD)

Upon being struck, enemy Turret icon turrets, Ward icon wards, jungle plants, MistWraithSquare Mist Wraiths and any other attack-interactive units are considered basic attacked once, while Champion icon champions and Turret icon turrets take on-hit effects (with all turret-specific rules applied).

Basic attacks reduce Piercing Darkness' Cooldown reduction icon cooldown by 1 second on-hit.

Info
Notes
  • Piercing Darkness' cast time scales linearily with Senna's champion level and scales non-linearily with her Attack speed icon bonus attack speed (beyond her per-level attack speed).
  • Senna can generally target anything that is not either explicitly Playful untargetable or herself.
    • Valid targets include anything that can be targeted by a basic attack from someone.
  • Piercing Darkness will attempt to lead the target if it is moving but does not adjust further during cast time (enemies can dodge the laser if they change their position by a sufficient amount during the cast time).
    • It leads by (up-to?) 80 units.
  • On-hit effects are applied in order of struck units' spawn IDs. This matters for effects that are consumed on-hit (e.g. Duskblade of Draktharr item Duskblade of Draktharr, 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 beginning of games, below are some examples.
    • If Senna targets an enemy champion but hits at least one more enemy champion simultaneously, Press the Attack rune 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 item Rapid Firecannon fully charged, the passive effect will most likely proc on the turret since towers are often spawned before champions.
  • Since Piercing Darkness is treated as a basic attack to Turret icon turrets, its damage is valid for the damage conversion from physical to magic when attacking them.
  • Spell Shield Spell shield will not prevent on-hit effects from being applied.
  • PENDING FOR TEST: Piercing Darkness interaction with Counter Strike dodging, Spirit's Refuge blocking, and Blind icon blinding effects.

Video
Senna - Q

Senna - Q

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Last Embrace
TARGET RANGE: Range center 1300
EFFECT RADIUS: Range center 280
WIDTH: Range model 140
SPEED: 1200
CAST TIME: 0.25
COST: 50 / 55 / 60 / 65 / 70 Mana
COOLDOWN: 11
Last Embrace

Active: Senna throws a globule of Black Mist in the target direction, dealing physical damage and sticking onto the first enemy hit for 1 second.

Physical Damage:
70 / 115 / 160 / 205 / 250 (+ 70% bonus AD)

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

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

Info
Notes
  • Last Embrace will not Root icon root the primary target if they are Playful untargetable.
  • Last Embrace will cast from wherever Senna is at the end of the cast time.

Video
Senna - W

Senna - W

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Curse of the Black Mist
EFFECT RADIUS: 400
CAST TIME: 1
COST: 70 Mana
COOLDOWN: 26 / 24.5 / 23 / 21.5 / 20
Detection Radius: 280
Curse of the Black Mist

Active: Senna surrounds herself with an aura of mist and gains Ambush 2 camouflage for a duration. If Senna breaks the camouflage, she can regain it until after 1.75 seconds of not performing actions that break stealth.

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

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

Curse of the Black Mist 2

Wraith Form: Gain Ambush 2 camouflage. Enemies will have Sweeper Drone icon obscured vision of Wraiths moving outside of the mist. Wraith Form can be regained if lost by breaking the camouflage after 1.75 seconds of not performing actions that break stealth. Wraith Form ends immediately upon Senna's Death death.

Senna and allies camouflaged by Curse of the Black Mist also gain Movement speed icon 20% bonus movement speed.

Info
Notes
  • Senna can move while casting.
  • 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 icon True Sight, Control Ward item Control Wards, and enemy Champion icon 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 OriginalSquare Evelynn's Demon Shade 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.
  • Oracle's Extract item Oracle's Extract has no effect on champions with the Cloak of Mist buff, even though Oracle's Extract has a range of 500, while the camouflage radius is only 280 or 400 in the case of Senna herself.
  • Wraith Form will not be granted to allies that are in a Omen of Death zombie state or are Channeling icon channeling. It will be granted to allies even if they are Playful untargetable.

Video
Senna - E

Senna - E

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Dawning Shadow
TARGET RANGE: Global
WIDTH: Range model 320 / 2400
SPEED: 20000
CAST TIME: 1
COST: 100 Mana
COOLDOWN: 160 / 140 / 120
Dawning Shadow

Active: Senna Sight icon reveals herself before firing two beams of spectral light in the target direction, granting Sight icon sight of the area briefly along its path. The center beam deals physical damage to enemy Champion icon champions hit.

Physical Damage:
250 / 375 / 500 (+ 100% bonus AD) (+ 50% AP)
Dawning Shadow 2

The broad beam Hybrid resistances icon shields Senna and allied champions hit for 3 seconds.

Shield:
120 / 160 / 200 (+ 40% AP)
(+ 1.5 per Absolution Mist collected)
 
Senna Original R 3
"No shadow without light!"

Info
Notes
  • Senna will always fire from the original casting position.

Video
Senna - R

Senna - R

Pets

Control type Autonomous
Target type Minion
Protection

Only Senna herself can interact with Mist Wraith.

Abilities

Wraith

Is considered an enemy unit.

Wandering

Disappears after 8 seconds.

References

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