Springheart Nantuko + Selesnya Sanctuary + Wayward Swordtooth + Horizon Explorer

Springheart Nantuko

Selesnya Sanctuary

Wayward Swordtooth

Horizon Explorer

How it works

1. Play Selesnya Sanctuary. When it enters untapped due to Horizon Explorer, Selesnya Sanctuary and Springheart Nantuko trigger.
2. Holding priority, activate Selesnya Sanctuary by tapping it, adding .
3. Resolve the Selesnya Sanctuary 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 Wayward Swordtooth.
5. Because of the additional Wayward Swordtooth token, you can play an additional land this turn.
6. Repeat.

This loop turns a simple land drop into an engine by leveraging Horizon Explorer to make sure your lands enter untapped, allowing Selesnya Sanctuary to repeatedly bounce itself back to your hand. Each time Selesnya Sanctuary enters the battlefield, the landfall ability on Springheart Nantuko triggers to feed your board state. Meanwhile, Wayward Swordtooth grants you the extra land drop needed to replay Selesnya Sanctuary and keep the entire cycle spinning indefinitely.