League of Legends Summoner Spell: Scorchclaw Smite

Gain 3 Ember stacks every 0.5 seconds, up to 100. Killing a large monster grants maximum stacks. When fully stacked, your next damaging basic attack or instance of ability damage against an enemy champion burns them and all enemies within 250 units of them, dealing bonus true damage equal to 4% of the target's maximum health over 4 seconds and slowing them by 30% decaying over 2 seconds.

Active: Deals 1200 true damage to the target medium / large monster or enemy minion and to all nearby monsters. Can be cast on enemy champions or pets to deal 40 true damage and slow the target by 20% for 2 seconds.