MTG >Combos >Viridian Joiner +Umbral Mantle +

Equip Viridian Joiner with Umbral Mantle tap it to add one mana. Pay two more mana and untap it, giving it +2/+2. Tap Viridian Joiner to add 3 mana. Pay 3 mana to untap it, giving it +2/+2 and tap it to add 5 mana. Repeat the process for infinite mana.