Aether Dragon

Flying, Haste
At the beginning of your upkeep, get {e}{e}.
{e}: Aether Dragon gets +1/+0 until end of turn.
{e}{e}{e}{e}: Put a +1/+1 counter on each creature you control.
{e}{e}{e}{e}{e}{e}{e}{e}{e}{e}: Destroy all creatures that you don't control.