Monk Gyatso + Priest of Urabrask + Umbral Mantle

RW identity

Commander legal

The 3 combo pieces

• Monk Gyatso
• Priest of Urabrask
• Umbral Mantle

How to execute it

1. Activate Umbral Mantle's equip ability by paying {0}, targeting Priest of Urabrask.
2. Monk Gyatso triggers, airbending Priest of Urabrask.
3. The Umbral Mantle ability fizzles due to no longer having a legal target.
4. Cast Priest of Urabrask from exile by paying {2}.
5. When Priest of Urabrask enters, it triggers, adding {R}{R}{R}.
6. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite red mana
• Infinite storm count
• Infinite untap of creatures you control
• Infinitely large creature until end of turn