Secrets of the Orphanage

You must use mana produced by a legendary
land to cast this spell.
Creatures you control have "{t}, Sacrifice a
creature: Investigate."
If a creature with defender would be sacrificed,
exile it instead. It returns to the battlefield under
your control at the beginning of the next upkeep.
"Leaving Wammy's House was like escaping the
grasp of a cult." - Mello