Femto, Hawk of Darkness

+2: Exile a card from a graveyard. If it was a creature card, create a 6/6 Black Demon Creature token with flying and Trample.
-X: Each player sacrifices X creatures. Create X 1/1 Blue and Black Demon Horror Creature Tokens with: This creature attacks this turn if able.
-12: Search your library for any number of Demons and put them onto battlefield.