Chosen Undead

Trample
Chosen Undead's power and toughness are equal
to the total number of creatures in all opponents' graveyards. When Chosen Undead enters or
leaves the battlefield, and whenever it attacks, for
each opponent that has five or less creatures in
their graveyard, they mill 1. If an opponent has
more than five creatures in their graveyard they
cannot block creatures you control with 5 or less
power.