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Damage over time

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Damage over time (DoT) is a term used to describe a single spell or attack which deals full damage not instantly but over a period of time, dealing a portion of its total damage at regular intervals. The damage is often done every second or every half-second, and each instant in which it is dealt is called a 'tick'.

The slow effect from Rylai's Crystal Scepter item.png Rylai's Crystal Scepter always applies a 20% slow from abilities which deal this type of damage; the slow is applied from the first tick of the DoT until 1 seconds after the last tick. The behavior with Area of Effect DoT spells is currently bugged in that a full 40% slow is applied for 1 second.

For single-target DoT spells, spell vamp will be applied to the total amount of damage dealt by all ticks.

Becoming untargetable (Fizz Fizz's Playful.png Playful/Trickster, Vladimir Vladimir's Sanguine Pool.png Sanguine Pool) does not stop DoT. However, Stasis icon stasis (Zhonya's Hourglass item.png Zhonya's Hourglass' active, Bard Bard's Tempered Fate.png Tempered Fate, self-casting Lissandra Lissandra's Frozen Tomb.png Frozen Tomb) will prevent DoT applications.

Types of DoTs and their sources

The different types of DoTs only differ in whether you can interrupt its duration by moving out of the area.

Non-decreasable duration

Once applied, there is no way to prevent further damage from the source.

Non-decreasable duration items.

Non-decreasable duration abilities

Non-decreasable duration summoner spells

Non-decreasable duration neutral buffs

Non-decreasable duration masteries

Tether-like DoTs

These are single-target abilities which deal damage over time by creating a visible link between the source of the damage and the target, they can be interrupted by moving out of range of or killing the enemy champion, if that champion is the source. Another difference is that further damage from these abilities cannot be avoided with the use of Quicksilver Sash item.png Quicksilver Sash.

Tether-like abilities

Damaging area DoTs

These refer to any ability which continually deals damage but requires enemy units to be in its area of effect. Some of these leave a damaging debuff that keeps damaging targets for some time after they leave the area. Some sources of this type of DoT are moving units while some affect a static area that damages enemies that stand or walk above it. Further damage from these abilities cannot be avoided with the use of Quicksilver Sash item.png Quicksilver Sash.

Static area DoTs

Moving area DoTs

Moving area items
Moving area abilities

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