Cloudstone Curio, Dual Nature, Molderhulk, and Overgrown Estate

Prerequisites

• Cloudstone Curio on the battlefield
• Dual Nature on the battlefield
• Molderhulk in hand
• Overgrown Estate on the battlefield
• You control at least one Swamp and at least one Forest that enter the battlefield untapped
• You have at least seven creature cards in your graveyard

Steps

1. Activate a Swamp and Forest by tapping them, adding
2. Activate Overgrown Estate twice by sacrificing the Swamp and Forest, causing you to gain 6 life
3. Cast Molderhulk by paying
4. When Molderhulk enters the battlefield, it, Dual Nature's first ability and Cloudstone Curio trigger
5. Resolve the Cloudstone Curio trigger, choosing to return nothing to your hand
6. Resolve the Dual Nature trigger, creating a token copy of Molderhulk
7. When the Molderhulk token enters the battlefield, it and Cloudstone Curio trigger
8. Resolve the Cloudstone Curio trigger, returning the nontoken Molderhulk from the battlefield to your hand
9. When the nontoken Molderhulk leaves the battlefield, Dual Nature's second ability triggers, exiling the token Molderhulk
10. Resolve the token Molderhulk's trigger from step 7, returning a Swamp from your graveyard to the battlefield
11. When the Swamp enters the battlefield, Cloudstone Curio triggers; choose not to return anything to your hand
12. Resolve the nontoken Molderhulk's trigger from step 4, returning a Forest from your graveyard to the battlefield
13. When the Forest enters the battlefield, Cloudstone Curio triggers; choose not to return anything to your hand
14. Repeat

Results

• Infinite ETB
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite storm count