MTG >Combos >Stormbound Geist +Solemnity +Kykar, Wind's Fury +

Solemnity doesn't allow permanents to have counters on them. Sacrifice Stormbound Geist with Kykar to add one mana. Undying's ability will trigger, returning Stormbound Geist to the battlefield Solemnity will not allow it to enter a +1/+1 counter Repeat the process for infinite mana.