Cookie Monster

All Demons, Zombies, Krakens, Octopuses, Leviathans, Apes, Dragons, Slivers, Beasts, Crocodiles, Demons, Devils, Dinosaurs, Eldrazi, Elephants, Goblins, and Giants are all monsters in addition to their other creature types.
Monsters you control cost {2} less to cast
{1}: Sacrifice a monster, search your library for a monster, and put it into your hand, shuffle your library afterwards.
Monsters you control get +3/+3, and Monsters other players control get -3/-3