Death Rattle | Magic: The Gathering
Formats Death Rattle is Legal in
Official Oracle Text for Death Rattle
Destroy target nongreen creature. It can't be regenerated.
Official Rulings for Death Rattle
6/7/2013 : If you sacrifice permanents or discard cards while casting the spell (for example, activating the mana ability of Blood Pet), those cards can be exiled using delve to reduce the spell's cost.