Monk Gyatso + Lightning Greaves + Leafkin Druid

Prerequisites

You control four or more creatures.

Steps

1. Activate Lightning Greaves' equip ability by paying {0}, targeting Leafkin Druid.
2. Monk Gyatso triggers. Choose not to airbend Leafkin Druid.
3. Resolve Lightning Greaves' ability, attaching it to Leafkin Druid.
4. Activate Leafkin Druid by tapping it, adding {G}{G}
5. Activate Lightning Greaves' equip ability by paying {0}, attaching it to Monk Gyatso.
6. Activate Lightning Greaves' equip ability by paying {0}, targeting Leafkin Druid.
7. Monk Gyatso triggers, airbending Leafkin Druid.
8. The Lightning Greaves ability fizzles due to no longer having a legal target.
9. Cast Leafkin Druid from exile by paying {2}.
10. Repeat.