MTG >Combos >Umbral Mantle +Gaea's Cradle +Obuun, Mul Daya Ancestor +

You need four or more creatures in play for this combo to work. In your combat phase, transform Gaea's Cradle into a creature. In the second main phase, attach Umbral Mantle to Gaea's Cradle and tap it to add four mana Pay three mana to untap Gaea's Cradle. Repeat the process.