Requires

Rin and Seri, Inseparable must be on the battlefield. Earthcraft must be on the battlefield. Whitemane Lion must be in hand. You control a basic Plains. Mana needed:

Steps

1. Cast Whitemane Lion by paying .
2. Rin and Seri triggers, creating a 1/1 Dog creature token.
3. Whitemane Lion enters the battlefield, triggering its ability.
4. Holding priority, activate Earthcraft by tapping the Dog token, untapping a basic Plains you control.
5. Activate the Plains by tapping it, adding .
6. Repeat from step 4 one additional time, tapping Whitemane Lion instead.
7. Resolve the Whitemane Lion trigger from step 3, returning itself from the battlefield to your hand.
8. Repeat.

Results