Molderhulk + Cloudstone Curio + Dual Nature + Seismic Assault

Molderhulk

Cloudstone Curio

Dual Nature

Seismic Assault

How it works

1. Activate a Swamp and Forest by tapping them, adding .
2. Cast Molderhulk by paying .
3. When Molderhulk enters the battlefield, it, Dual Nature's first ability and Cloudstone Curio trigger.
4. Resolve the Cloudstone Curio trigger, choosing to return nothing to your hand.
5. Resolve the Dual Nature trigger, creating a token copy of Molderhulk.
6. When the Molderhulk token enters the battlefield, it and Cloudstone Curio trigger.
7. Resolve the Cloudstone Curio trigger, returning the nontoken Molderhulk from the battlefield to your hand.
8. When the nontoken Molderhulk leaves the battlefield, Dual Nature's second ability triggers, exiling the token Molderhulk.
9. Resolve the token Molderhulk's trigger from step 6, returning a Swamp from your graveyard to the battlefield.
10. When the Swamp enters the battlefield, Cloudstone Curio triggers, returning another Swamp from the battlefield to your hand.
11. Resolve the nontoken Molderhulk's trigger from step 4, returning a Forest from your graveyard to the battlefield.
12. When the Forest enters the battlefield, Cloudstone Curio triggers, returning another Forest from the battlefield to your hand.
13. Activate Seismic Assault twice by discarding the Swamp and Forest, dealing 4 damage to any target.
14. Repeat.

This ingenious loop turns Molderhulk into a self-sustaining engine by taking advantage of the unique copy dynamics created by Dual Nature. Every time Molderhulk enters, the Curio bounce from Cloudstone Curio resets the original so it can be recast cheaply using the lands it recycles from your graveyard. As those lands enter the battlefield, they continually trigger additional land returns and fuel Seismic Assault to throw endless damage directly at your opponents.