Springheart Nantuko | Dryad Arbor | Nissa, Who Shakes the World (and one other card)

Cards

All permanents on the battlefield (
Springheart Nantuko attached to
Dryad Arbor ).

You have a land card in hand.
You are able to play a land this turn.
You have a land card in hand.
You are able to play a land this turn.
You control a Forest that does not have summoning sickness and that enters the battlefield untapped.

Play a land. When the land enters,
Springheart Nantuko triggers, causing you to pay ({1} magic symbol) ({G} magic symbol) 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} magic symbol) .
Nissa, Who Shakes the World triggers, adding ({G} magic symbol) .
Resolve the
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) 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} magic symbol) ({G} magic symbol) , attaching it to the animated Forest.
Activate the animated Forest by tapping it, adding ({G} magic symbol) .
Nissa triggers, adding ({G} magic symbol) .
Play a land.
When the land enters the battlefield,
Springheart Nantuko triggers, causing you to pay ({1} magic symbol) ({G} magic symbol) 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} magic symbol) .
Nissa triggers, adding ({G} magic symbol) .
Resolve the
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) to create a token copy of the Forest it is attached to.
Repeat from step 6.

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