Vilehide, Lich Ursidae

Whenever Vilehide, Lich Ursidae attacks, you
and the defending player each sacrifice a creature
with power 2 or less. For each player that did not
sacrifice a creature this way, you mill two cards.
At the beginning of your endstep, mill cards
equal to twice the number of creature cards in
your graveyard with power and toughness equal
to 2, then return up to two of them to the
battlefield tapped under your control.