Kalaziel, Dark Overlord

Flying, first strike, deathtouch, lifelink
Other Angels you control get +1/+1 and have deathtouch.
Whenever another creature you control dies, each opponent sacrifices a permanent.
If a creature an opponent controls would die,
exile it instead.
{b}{b}: Kalaziel, Dark Overlord gains vigilance and indestructible until end of turn.