Cu'lad Wurm

Land-walk, Indestructible
Whenever Cu'lad Wurm deals damage to a player take a land from that player and put it under Cu'lad Wurm until Cu'lad Wurm is no longer on the battlefield. Lands are tapped separately for mana
Reformer (If this card is in the gaveyard or exile, you can sacrifice a land to bring it to the battlefield; only as a sorcery)