Springheart Nantuko + Dryad Arbor + Nissa, Who Shakes the World + Tyvar, Jubilant Brawler
Other: Infinite ETB, Infinite tapped creature tokens, Infinite landfall triggers, Infinite tapped Forest tokens
Play a land. When the land enters, Springheart Nantuko triggers, causing you to pay {1}{G} to create a token copy of Dryad Arbor.
When the Dryad Arbor token enters, Springheart Nantuko triggers. Holding priority, activate the Dryad Arbor token by tapping it, adding {G}.
Nissa, Who Shakes the World triggers, adding {G}.
Resolve the Springheart Nantuko trigger, causing you to pay {1}{G} to create a token copy of Dryad Arbor.
Repeat from step 2.
Activate Nissa's first loyalty ability by putting a loyalty counter on it, animating a Forest you control.
Cast Springheart Nantuko for its bestow cost by paying {1}{G}, attaching it to the animated Forest.
Activate the animated Forest by tapping it, adding {G}.
Nissa triggers, adding {G}.
Play a land.
When the land enters the battlefield, Springheart Nantuko triggers, causing you to pay {1}{G} to create a token copy of the Forest it is attached to.
When the Forest token enter the battlefield, Springheart Nantuko triggers.
Holding priority, activate the Forest token by tapping it, adding {G}.
Nissa triggers, adding {G}.
Resolve the Springheart Nantuko trigger, causing you to pay {1}{G} to create a token copy of the Forest it is attached to.
Repeat from step 6.
Cards: Springheart Nantuko, Dryad Arbor, Nissa, Who Shakes the World, Tyvar, Jubilant Brawler