Rokan, Maw of Energy

Flying, Trample
Whenever Rokan, Maw of Energy attacks, it deals
5 damage to defending player and 2 damage to
each creature that player controls. If a creature
would die this way, exile it instead.
Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.)
Its energy shockwaves won't stop us with this new
armor I made!—Rowan Kenrith, last words.