True damage

True Damage is a type of damage that ignores any kind of damage reduction (but not effects that block damage, like Banshee's Veil passive)

Skills that deal True Damage

 * Irelia's Hiten Style
 * Cho'Gath's Feast
 * Olaf's Reckless Swing
 * Corki's Hextech Shrapnel Shells (Innate)
 * Nunu's Consume
 * Kog'Maw's Icathian Surprise

Summoner Spells that deal True Damage

 * Ignite