Monk Gyatso, Heartless Summoning, and Outrider en-Kor

Prerequisites

• Monk Gyatso on the battlefield
• Heartless Summoning on the battlefield
• Outrider en-Kor on the battlefield

Steps

1. Activate Outrider en-Kor by paying , targeting itself
2. Monk Gyatso triggers, airbending Outrider en-Kor
3. The Outrider en-Kor ability fizzles due to no longer having a legal target
4. Cast Outrider en-Kor from exile by paying due to Heartless Summoning
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count