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 always applies a 15% slow from abilities which deal this type of damage; the slow is applied from the first tick of the DoT until 1.5 seconds after the last tick.
For single-target DoT spells, spell vamp will be applied to the total amount of damage dealt by all ticks.
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Types of DoTs and their sources 
Edit
The different types of DoTs only differ in whether you can interrupt its duration by moving out of the area.
Non-decreasable duration Edit
Once applied, there is no way to prevent further damage from the source apart from activating 
Quicksilver Sash to cleanse the effect.
Non-decreasable duration items. Edit
Non-decreasable duration abilities Edit
- Brand's Blaze
- Caitlyn's Yordle Snap Trap
- Cassiopeia's Noxious Blast
- Darius's Hemorrhage
- Draven's Wicked Blades
- Fizz's Seastone Trident
- Gangplank's Grog Soaked Blade
- Malzahar's Malefic Visions
- Mordekaiser's Children of the Grave
- Nautilus's Titan's Wrath applies to all units in an area around his attack target.
- Nidalee's Bushwhack
- Singed's Poison Trail
- Swain's Torment
- Talon's Noxian Diplomacy
- Teemo's Toxic Shot
- Teemo's Noxious Trap
- Tristana's Explosive Shot
- Trundle's Agony
- Twitch's Deadly Venom
- Udyr's Tiger Stance
- Urgot's Noxian Corrosive Charge
- Viktor's Death Ray if Augment: Death is purchased.
Non-decreasable duration summoner spells Edit
Non-decreasable duration neutral buffs Edit
Tether-like DoTs Edit
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.
Tether-like abilities Edit
- Fiddlesticks's Drain
- Karma's Focused Resolve
- Karma's Renewal
- Malzahar's Nether Grasp
- Nocturne's Unspeakable Horror
- Swain's Decrepify
Damaging area DoTs Edit
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.
Static area DoTs Edit
- Anivia's Glacial Storm
- Cassiopeia's Miasma
- Corki's Valkyrie
- Katarina's Death Lotus
- Malzahar's Null Zone
- Miss Fortune's Make It Rain
- Miss Fortune's Bullet Time
- Morgana's Tormented Soil
- Nasus's Spirit Fire
- Pantheon's Heartseeker Strike
- Rumble's The Equalizer
- Shyvana's Burnout whilst using Dragon's Descent
Moving area DoTs Edit
Moving area items Edit
Moving area abilities Edit
- Alistar's Trample
- Amumu's Despair
- Annie's Summon Tibbers
- Corki's Gatling Gun
- Dr. Mundo's Burning Agony
- Fiddlesticks's Crowstorm
- Garen's Judgment
- Hecarim's Spirit of Dread
- Jayce's Lightning Field
- Karthus's Defile
- Mordekaiser's Creeping Death
- Nasus's Fury of the Sands
- Rammus's Tremors
- Renekton's Dominus
- Rumble's Flamespitter
- Sejuani's Northern Winds
- Shyvana's Burnout
- Udyr's Phoenix Stance
- Viktor's Chaos Storm
- Vladimir's Sanguine Pool
- Wukong's Cyclone
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