Void, Angel of Death

Flying, first strike, haste, trample
Void, Angel if Death enters play with two refrain counters on it. Whenever it attacks, remove one.
At the end of your turn, if Void, Angel of Death
has no refrain counters on it, exile Void, then
return it to the battlefield transformed.
Annihilation 1 (Whenever this creature attacks, all players sacrifice one permanent.)