Mydamra, God of Battle

Trample, menace, indestructible
Mydamra, God of Battle can't attack or block
unless you control an Angel and a Demon.
{b}{r}, Sacrifice 5 creatures: Create a 5/5 black
Demon creature token with flying and trample.
{w}{r}, Pay 4 life: Create a 4/4 white Angel
creature token with flying and lifelink.