Vigean Graftmage + Living Plane + Heartbeat of Spring

Vigean Graftmage

Living Plane

Heartbeat of Spring

How it works

1. Play the land that taps for multiple mana.
2. That land enters as a creature due to Living Plane, triggering Vigean Graftmage's Graft ability, allowing you to move a +1/+1 counter from Vigean Graftmage to that land.
3. Activate that land by tapping it, adding at least two mana.
4. Heartbeat of Spring triggers, adding at least one additional mana.
5. Activate Vigean Graftmage by paying 1, untapping the land creature.
6. Repeat.