mtg commander steal deck How to Build a Theft In Custom Commander Deck*** Greven, Predator

If you have reason to change only specific Creatures, however, this could be a powerful effect

While inefficient at four mana before increasing X, the lifegain is a nice way to counteract the decks many cards which require life as an additional cost

They realized that a lot of newer players existed that wanted to be able to play with cards from the early releases on since 1993

They gain haste until end of turn

This feels like a fixed Cathars' Crusade

Does your deck reliably manipulate the top of its library (via draw, Scry, Surveil, or some other method) to help smooth your draws so you hit the Lands and other mana sources you need