How it works
Prerequisites
- You control a nontoken creature that has morph or megamorph.
- You have a creature card in hand that has morph or megamorph.
Steps
- 1Cast the creature card in your hand for its morph or megamorph cost by paying , putting it onto the battlefield face down as a 2/2 creature.
- 2When the creature enters the battlefield, Cloudstone Curio triggers, returning another creature card with morph or megamorph from the battlefield to your hand.
- 3Repeat.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?