Mazandel, Cullblade Archangel

Flying, Haste, Menace
{b}{r}: Destroy target creature or planeswalker.
Mazandel, Cullblade Archangel enters the battlefield with X +1/+1 counters on it, where X
is the total life lost by your opponents this turn.
Destroy all creatures target opponent controls. Mazandel, Cullblade Archangel deals damage
to that player equal to their total power.