Chaos Sorcerer

Ward {p/w}{p/b}, Reach, Offering(When casting this
card you may sacrifice creatures you control of the
same type. This card costs {x} less equal to the
combined mana value of the creatures sacrificed.)
{t}: Exile target creature with a mana value of 4
or less.
Creatures you control with Ritual have
Annihilator 1.