Alooxa, Ancient Guide

Eminence-Treasures enter the battlefield tapped.
Whenever a creature card is put into your
graveyard from anywhere, you may exile it from
your graveyard. If you do, create X treasures
where X is that creatures power.
Sacrifice two treasures: Exile the top card card
of your library. You may cast non-creature spells
exiled this way as long as a creature has died this
turn