Prerequisites
- Necroduality on the battlefield
- Rooftop Storm on the battlefield
- Cloudstone Curio on the battlefield
- You have a nonlegendary, nonartifact Zombie card in hand
Steps
- Cast a nonlegendary, nonartifact Zombie by paying
- The Zombie enters the battlefield, triggering Cloudstone Curio and Necroduality
- Resolve the Cloudstone Curio trigger, returning nothing to your hand
- Resolve the Necroduality trigger, creating a token copy of the Zombie
- Cloudstone Curio triggers, returning the nontoken Zombie to your hand
- Repeat
