Requires

Yedora, Grave Gardener must be on the battlefield. Primordial Mist must be on the battlefield. Hungering Hydra must be in hand. Mana needed:

Steps

1. Cast Hungering Hydra for = 0.
2. Hungering Hydra dies due to having zero toughness.
3. Yedora triggers, returning it to the battlefield face-down as a Forest land.
4. Activate that Forest adding .
5. Activate Primordial Mist by exiling the face-down Hungering Hydra, and allowing you to cast it this turn.
6. Repeat.

Results