Springheart Nantuko + Simic Growth Chamber + Horizon Explorer + Icetill Explorer

Springheart Nantuko

Simic Growth Chamber

Horizon Explorer

Icetill Explorer

How it works

1. Play Simic Growth Chamber. When it enters untapped due to Horizon Explorer, Simic Growth Chamber and Springheart Nantuko trigger.
2. Holding priority, activate Simic Growth Chamber by tapping it, adding .
3. Resolve the Simic Growth Chamber trigger, returning it from the battlefield to your hand.
4. Resolve the Springheart Nantuko trigger, causing you to pay 1 to create a token copy of Icetill Explorer.
5. Because of the additional Icetill Explorer token, you can play an additional land this turn.
6. Repeat.