• Illaoi cannot spawn inheritTentacles on ally invulnerable structures ^(note), in addition to neither her nor the inheritVessel being able to spawn them in Nexus Obelisk's attack range.
  • Even after Nexus turrets have lost their invulnerability, Illaoi still has issues spawning inheritTentacles on them (probably because of the nearby invulnerable Nexus). ^(bug)
• inheritTentacles will prioritize spawning on map terrain before player-made ones.
• If multiple inheritTentacles hit simultaneously, the received healing is calculated iteratively based on the new amount of missing health, as per this formula: Champions killed with Comeuppance (R)(maximum health − current health) × (1 − 0.955ⁿ), with 'n' the number of inheritTentacle hits.

Arena differences ^edit

• Heal health ratio changed to Champions killed with Comeuppance (R)2.5% missing health.

• This ability will cast from wherever the caster is at the end of the cast time.
  • Tentacle Smash's hitbox is fixed in front of Illaoi, while the indicator on the ground is fixed to the targeted direction.
• PENDING FOR TEST: Tentacle Smash visual indicator of the hitbox is visible to enemies even when cast in the fog of war.

Type		Cast time
Attacking		Disabled
Abilities		Test of Spirit and Leap of Faith are buffered. Harsh Lesson is usable.
Movement		Disabled
Items	Usable	Shurelya's Battlesong Youmuu's Ghostblade Randuin's Omen
	Disabled	All the other item-actives are disabled
	Interrupted by	N/A
Consumables		Usable
Spells	Usable	Barrier Clarity Cleanse Exhaust Ghost Heal Ignite Smite
	Disabled	Flash Teleport Recall Hexflash
	Interrupted by	N/A
Interrupted by		Death, unless protected by Resurrection

Potential bug: If you hit someone with illaoi Q, while having the conquerer rune, the damage of the slam is always amplified by one bonus conquerer stack.

Arena differences ^edit

• Bonus tentacle damage changed to 4 / 8 / 12 / 16 / 20%.

• The bonus damage doesn't apply  life steal but it does apply  spell vamp and Omnivamp.
• Harsh Lesson is made of two different abilities which are decided by Illaoi's range to the target, being either melee or within dash range.
• The close range ability:
  • Has an uncancellable windup.
  • Can be used while grounded or rooted. If Illaoi attack commands and then casts Harsh Lesson while rooted, she is able to use the close range version within its dash range. ^(bug)
  • Starting the attack before triggering Guardian Angel's passive and hitting while she's in it will not cause the inheritTentacles to slam. ^(bug)
  • The attack will still hit if the target becomes untargetable, but will not if it dies. ^(note)
  • inheritTentacles will slam if the attack is blocked, but not if it's dodged or if it misses. ^(note)
  • Does trigger Hail of Blades.
  • Triggers Energized effects on-hit.
  • If the empowered attack duration ends during the attack animation, the attack won't be empowered. ^(note)
  • After hitting the target, Illaoi can quickly cast other abilities.
  • Abilities cannot be buffered during the windup.
  • PENDING FOR TEST: The attack goes through spell shields.
• The dash range ability:
  • Does not have an uncancellable windup, meaning effects that can interrupt the dash will cancel the attack and put the ability on cooldown.
  • Can be cast but cannot be used while grounded or rooted because Illaoi loses the  bonus attack range.
  • The attack will not hit if the target becomes untargetable, but does hit if it dies. ^(note)
  • inheritTentacles will slam if the attack is dodged, blocked or if it misses.
  • Does not trigger Hail of Blades. ^(bug)
  • Triggers Energized effects during the jump. ^(bug)
  • Having enough attack speed will perform an unusual dunk. ^(note)
  • If the empowered attack duration ends during the dash, the buff will linger until the attack has finished.
  • After hitting the target, Illaoi has a short delay before she can cast other abilities. ^(note)
  • Abilities can be buffered during the windup.
  • The attack goes through spell shields, but also triggers them. ^(bug)
• If the target dies at the instant Harsh Lesson is about to hit the target, the attack will hit, be consumed, but will not make the inheritTentacles slam. ^(bug)
• The inheritTentacle attacking because of Harsh Lesson is considered to be of the same cast instance, and thus will not grant additional stacks of Conqueror, Electrocute, Phase Rush and Tribute. ^(note)
• Harsh Lesson triggers Bone Plating and one of its plates with the same attack. ^(note)
  • It also triggers Arcane Comet and reduces its cooldown twice.
• While the ability is active, inheritTentacles are commanded to attack on-hit, interacting with Guinsoo's Rageblade without consuming the empowered attack.
• Attack moving while charging Hexflash will delay the attack.

Arena differences ^edit

• Cooldown changed to 6 seconds.

• inheritSpirits are classified as clones:
  • inheritSpirits can only be fully targeted by Illaoi's team and neutral monsters. The inheritSpirit's allies cannot manually select it as a valid target for spells and abilities, but they can still do so with automatically targetted effects. ^(bug)
  • inheritSpirits take 50% damage from turrets. ^(bug)
  • inheritSpirits cannot be healed nor shielded ( Summon Aery excluded ^(bug)).
  • The inheritSpirit levels up when the inheritVessel does, gaining the target's stats per level. If the target has a resource that also increases per level (i.e mana), the inheritSpirit's lifetime will increase instead. ^(bug)
• The inheritSpirit's destination is decided based on Illaoi's position and facing direction when the target is hit.
• The inheritSpirit is untargetable while it is being pulled, and spawns with the tethered champion's default model and size.
  • The inheritSpirit's lifetime is sometimes 0.25 seconds longer, while its untargetability is sometimes shorter, causing inheritTentacles to hit an inconsistent amount of times.
• Redirected damage is calculated by taking the pre-mitigation damage against the inheritSpirit, applying Test of Spirit's damage modifier, and then capping it to the inheritSpirit's Champions killed with Comeuppance (R)current health. This damage will then be affected by damage modifiers (resistances and other effects) of the inheritVessel.
  • This order of operations allows Test of Spirit to deal more or less percentage of the inheritVessel's Champions killed with Comeuppance (R)health than would be expected:
    1. Because the inheritSpirit's modifiers can be different from the inheritVessel's, and the damage being pre-mitigated, allowing the inheritSpirit to have higher or lower effective health, respectively increasing or decreasing the maximum achievable damage from killing it.
    2. Because the cap is supposed to block excess damage over the inheritSpirit's Champions killed with Comeuppance (R)current health, which does not reliably do so or does too well, depending on whether the inheritSpirit's damage modifier is higher than Test of Spirit's or not, respectively. This causes an increasing difference of damage when the pre-mitigated damage is between Spirit current health ÷ Spiritmod and Spirit current health ÷ Emod. ^(bug)
       • To fix this case, pre-mitigated damage would need to be capped at the amount that kills the inheritSpirit, and only then have Test of Spirit's damage modifier apply.
  • Illaoi needs Champions stunned with Pyromania (P)937.5 / 875 / 812.5 / 750 / 687.5 total AD to reach 100% redirected damage. As per above, the damage is still dependent on the inheritSpirit's and inheritVessel's damage modifiers and may not always be able to deal 100% of the target's current health as total redirected damage.
• Spell shields may only prevent the initial spirit grab and the slow upon becoming a inheritVessel. Spell shields will not prevent becoming a inheritVessel or inheritTentacles from attacking.
• The tendril can be blocked by abilities such as Yasuo's Wind Wall, but the returning tether slow cannot, even if it can otherwise be destroyed by effects that can do so (i.e untargetability).
  • The tether slow will not be fired if the target is already untargetable when the inheritSpirit dies.
• The spirit pull is not considered a crowd control effect and will not be blocked by crowd control immunity, with the exception of Morgana's Black Shield.^(note)
• The projectile tentacle model is linked to Illaoi's model animation and size. However gameplay wise it is not, thus the actual hitbox being different than the position, width and length of the visible model. ^(bug)
  • The model will stop mid-air / vanish if Illaoi goes into stasis, sleep or airborne, however the actual hitbox will continue its trajectory unseen.
  • PENDING FOR TEST: The projectile is however seen by enemies if Illaoi is not visible.
• This ability will cast from wherever the caster is at the end of the cast time.
  • And will fire towards the same pointed location.
• Grabbing the inheritSpirit of a champion before it goes into resurrection via Chronoshift or Guardian Angel will spawn the inheritSpirit with 0 health, making it invulnerable. ^(bug)
  • The same does not happen with other resurrection effects (i.e Karthus' Death Defied) since they leave the champion with more than 0 health.
• Grabbing the inheritSpirit of Viego will make the inheritSpirit's lifetime (the white bar below the lifebar) disappear. ^(bug)
• PENDING FOR TEST: Grabbing the inheritSpirit of an Oathsworn will make the inheritSpirit invisible. ^(bug)
• Illaoi is the only one able to see who's been inheritVesseled, by adding a layer of watery effects on their model. The inheritVessel will also be let known it's debuffed, by having a layer of watery effects on its screen instead.
  • If the target becomes a inheritVessel while vanished, the layer on their model will fail to be added. ^(bug)
• The inheritVessel status effect is a debuff that doesn't persist through death.
• If the target is made a inheritVessel while resurrecting, they will not revive as a inheritVessel.
• Runes consider the inheritSpirit as a champion for their effects and stat-tracking. ^(note)
  • inheritTentacles damage with First Strike only reflects double bonus damage, not taking into account actual damage done to the inheritSpirit (e.g if First Strike would deal 3 bonus damage, what would get reflected is 6 damage). ^(bug)
• Transferred damage will apply on-damage effects, such as Black Cleaver, Morellonomicon, Executioner's Calling, Riftmaker, Aspect of the Dragon burn damage, and The Darkin Scythe.
  • Redirected damage always counts as single target for the purpose of Omnivamp.
  • Transferred damage will not doubly apply on-hit or on-spell effects versus the target (e.g. Liandry's Torment, Phase Rush stacks). These effects are only applied versus the inheritSpirit.
  • Attacking the inheritVessel and its inheritSpirit simultaneously will only apply one stack of Black Cleaver to the inheritVessel. ^(note)
• When the tether is broken (whether the inheritSpirit's lifetime ran out or the target moved out of range), the inheritSpirit will vanish and move to Illaoi's location.
  • An uncancellable windup attack may still kill the inheritSpirit after it vanished to grant the gold, but without making the target a inheritVessel.
• The inheritSpirit is immune to stasis (i.e. Bard's Tempered Fate).
• Fiora's Riposte can be used to prevent becoming a inheritVessel if used before the inheritSpirit is killed or while leaving the tether's range.
• Sion's inheritSpirit cannot be spawned during Glory in Death. inheritSpirits created before Sion's zombie state will remain active.
• If the target that had its inheritSpirit pulled from them is taken into the Realm of Death, the tether will break, but they will not be made into a inheritVessel.
• The following table refers for interactions while Illaoi is firing the projectile and while the target's inheritSpirit is being pulled:

Attacking		Disabled
Abilities		Tentacle Smash and Leap of Faith are buffered. Harsh Lesson is usable, but is buffered while pulling the inheritSpirit. (note)
Movement		Disabled
Items	Usable	N/A
	Disabled	All items are disabled
	Interrupted by	N/A
Consumables		Disabled
Spells	Usable	Barrier Clarity Cleanse Exhaust Ghost Heal Ignite Smite
	Disabled	Flash Teleport Recall Hexflash
	Interrupted by	N/A
Interrupted by		Death

• Other than area of effects, since Riftmaker, Aspect of the Dragon burn damage, and The Darkin Scythe apply on the inheritSpirit and the inheritVessel individually and as separate instances of damage, their bonus damage through the redirection is effectively enhanced. In particular, Riftmaker and The Darkin Scyte will further apply on their own redirected bonus damage.
  • Note, the same does not apply for damage modifiers without a separate instance of damage (i.e Last Stand).
  • PENDING FOR TEST: Does the above still apply for Riftmaker after its V12.23 change?

• This ability will cast from wherever the caster is at the end of the cast time.
• Illaoi spawns the inheritTentacle 700 range away from her, unless there's a natural wall blocking the way making the inheritTentacle spawn on it, with an angle relative to the direction she's facing.
  • 1+ champions: one inheritTentacle at 0 degrees. (towards Illaoi's facing direction)
  • 2+ champions: one inheritTentacle at 60 degrees.
  • 3+ champions: one inheritTentacle at 300 degrees.
  • 4+ champions: one inheritTentacle at 120 degrees.
  • 5+ champions: one inheritTentacle at 240 degrees.
  • 6+ champions: one inheritTentacle at 180 degrees.
  • inheritTentacles may spawn on base barriers. If Illaoi is in the center of a base barrier, all inheritTentacles will spawn in the same position and stack over each other, making it appear as if there was only one inheritTentacle.
  • Illaoi's facing direction is decided by the position of the cursor on cast, but can also be changed mid-cast through other effects, such as Flash.
  • If there are no walls nearby, spawning the last inheritTentacle will form a perfect hexagon.
• Spell shields will block the ability's damage but will not prevent inheritTentacles from spawning.
• If Illaoi dies within 0.25 seconds of dropping down, she will spawn buffed inheritTentacles, but she won't manage in time to buff the already spawned ones. ^(bug)
• If Illaoi is near a inheritTentacle that is about to spawn, it will spawn buffed by Leap of Faith even if Illaoi is no longer nearby.
• Using Harsh Lesson after Illaoi drops down will command inheritTentacles to instantly attack, regardless if they were already attacking. Their old attack will keep on going and will hit while the second attack is on its animation attack. ^(bug)
  • This makes it possible for the same tentacle to reduce its own damage by having the second attack hit too fast, which is not otherwise possible.
• Using Harsh Lesson an instant before Leap of Faith's buff finishes will delay the inheritTentacle's attack. ^(bug)