Sandalphon, The 8th Angel

Hexproof, Annihilator 3
All other Avatar creatures you control gain annihilator 1 + the number of angel Avatars
you control.
When Sandalphon enter the battlefield,
place 1 Impact counter on each opponent.
(If your opponent has 15 Impact counters,
They lose the game. these counters cannot
be proliferated.)