If you do, create a token that's a copy of that creature, except it's a Spirit in addition to its other types and it has "When this token leaves the battlefield, return the exiled card to its owner's graveyard." Whenever another nontoken creature you control dies, exile it
I'll always remember the Black-Green Elves deck that Charles Gindy used to win Pro Tour Hollywood in 2008
3 IMPORTANT ENERGY CARDS FROM THE FALLOUT PRECON The Science! precon is lacking when it comes to powerful Energy win conditions apart from its Commander
Annie Flash, the Veteran Any creature with a triggered ability when it enters always gets me thinking of ways to get it over and over, but I think the relevant text is the tap trigger here
Booster Fun: Borderless Planeswalkers Have you met the goodest boy in the Magic Multiverse
Terror is Warstorm Surge on a body, and can turn mass deployment or reanimation into mass damage