Dolgg, Sparer of None

Trample, Haste, Annihilator 2
You may sacrifice any number of creatures as
you cast this spell. This spell cost {2} less for each sacrificed creature.
Dolgg's power is equal to the number of
creatures that entered a graveyard this turn.
{b}{r}{g}: Put the top 11 cards of your library into
your graveyard.
Sacrifice Dolgg: Shuffle it and up to 11 other
cards from your graveyard into your
library.