Cloudstone Curio + Resolute Reinforcements + Earthcraft + Primal Vigor

Cloudstone Curio

Resolute Reinforcements

Earthcraft

Primal Vigor

How it works

1. Cast Resolute Reinforcements by paying 1.
2. When Resolute Reinforcements enters the battlefield, it and Cloudstone Curio trigger.
3. Resolve the Cloudstone Curio trigger, choosing to return nothing to your hand from the battlefield.
4. Resolve the Resolute Reinforcements trigger, creating two 1/1 Soldier creature tokens.
5. When the Soldiers enter the battlefield, Cloudstone Curio triggers twice.
6. Resolve the first trigger, returning Resolute Reinforcements to your hand from the battlefield.
7. Resolve the second trigger, choosing to return nothing to your hand from the battlefield.
8. Activate Earthcraft by tapping a Soldier token, untapping a basic Plains you control.
9. Activate the Plains by tapping it, adding .
10. Repeat from step 8 for the remaining Soldier token.
11. Repeat from step 1.

This clever loop relies on Earthcraft to turn your newly created creatures into mana sources by tapping them to untap a basic land, paying the exact white mana needed to replay the threat. As you recast Resolute Reinforcements, Cloudstone Curio watches the creature and its accompanying tokens enter the battlefield, providing the necessary bounce trigger to return the spell to your hand while Primal Vigor doubles your token output to ensure you always come out ahead on mana and materials.