Springheart Nantuko | Dryad Arbor | Earthcraft (and one other card)

Cards

You have at least one land card in hand.
You are able to play a land this turn.
You control at least one basic Forest, or the land card in your hand is a basic Forest.

Play any land from your hand, ensuring to play a basic Forest if you have one in hand.
When the land enters the battlefield,
Springheart Nantuko triggers, causing you to pay ({1} magic symbol) ({G} magic symbol) to create three token copies of
Dryad Arbor.
When the
Dryad Arbor tokens enter the battlefield,
Springheart Nantuko triggers three times.
Holding priority, activate a basic Forest by tapping it, adding ({G} magic symbol) .
Activate
Earthcraft by tapping a
Dryad Arbor token, untapping the basic Forest.
Repeat steps 4 and 5 one additional time.
Resolve the first and second
Springheart Nantuko triggers, choosing not to pay and creating six 1/1 Insect creature tokens.
Resolve the second
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) to create three token copies of
Dryad Arbor.
Repeat from step 3.

This combo has been estimated to be Exhibition (Bracket 1+).