Vigean Graftmage + Regal Behemoth + Living Plane

Vigean Graftmage

Regal Behemoth

Living Plane

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. Regal Behemoth triggers, adding at least one additional mana.
5. Activate Vigean Graftmage by paying 1, untapping the land creature.
6. Repeat.