Deidara, Explosive Claymaster

Flying
At the beginning of your end step, put a clay
counter on target creature an opponent controls.
When Deidara is destroyed, flip a coin for each creature with a clay counter on it. For each
Heads flip, destroy the creature.
Whenever Deidara attacks, create a Clay Dragon attacking the same player. If a Clay Dragon is in
play, put a +1/+1 counter on it instead.