New Sorcery Keystone Idea: Supernova
Intended users: Champions that mix spell weaving and diving such as Diana, Akali, and Elise.
Effect: After landing a spell on an enemy champion, charge up with arcane energy and gain a supernova stack. Landing multiple spells gains additional stacks (max 4). 3 seconds after landing the first spell, release a burst of arcane energy from your champion (think a radius the size of randuins omen) that deals 15-80 (based on level) (+15% AP) (+25% bonus ad) adaptive damage per stack.
Cooldown something like 35-10 based on level.
Thoughts?