Molderhulk + Cloudstone Curio + Necroduality + Overgrown Estate

Molderhulk

Cloudstone Curio

Necroduality

Overgrown Estate

How it works

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, Necroduality and Cloudstone Curio trigger.
5. Resolve the Cloudstone Curio trigger, choosing to return nothing to your hand.
6. Resolve the Necroduality 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. Resolve the token Molderhulk's trigger, returning a Swamp from your graveyard to the battlefield.
10. When the Swamp enters the battlefield, Cloudstone Curio triggers; choose not to return anything 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; choose not to return anything to your hand.
13. Repeat.

This clever engine leverages Molderhulk's undergrowth cost reduction to cast it for just {B}{G}, relying on its land-retrieving entrance trigger to constantly recycle the very lands you feed away. As you cast and recast your creatures, Necroduality doubles your investment by flooding the board with token copies of Molderhulk every time the original enters. Meanwhile, Cloudstone Curio watches the chaos unfold, allowing the arriving token to bounce the original back to your hand so you can repeat the loop infinitely. To keep the mana flowing and the life totals ticking steadily upward, Overgrown Estate sacrifices those recycled lands for a quick infusion of life.