Arcane Missiles damage increased by 100%, fires at up to additional 2 nearby targets, and generates maximum Arcane Salvo stacks.
Gaining Clearcasting has a 25% chance to cause your next Arcane Missiles to be Overpowered, causing it to deal 100% increased damage, generate maximum stacks of Arcane Salvo, and strike 3 additional targets at 50% effectiveness.