Kiri-Onna + Petalmane Baku + Ugin's Conjurant + Ezzaroot Channeler

Kiri-Onna

Petalmane Baku

Ugin's Conjurant

Ezzaroot Channeler

How it works

1. Cast Ugin's Conjurant, choosing to have X=4, but paying 0 due to Ezzaroot Channeler.
2. Petalmane Baku and Kiri-Onna trigger.
3. Resolve the Petalmane Baku trigger, putting a ki counter on it.
4. Resolve the Kiri-Onna trigger, returning it to your hand from the battlefield.
5. Cast Kiri-Onna by paying due to Ezzaroot Channeler.
6. Petalmane Baku triggers, putting a ki counter on it.
7. When Kiri-Onna enters the battlefield, it triggers, returning Ugin's Conjurant to your hand from the battlefield.
8. Repeat steps 1 through 4 one additional time.
9. Activate Petalmane Baku by paying 1 and removing three ki counters from it, adding .
10. Repeat steps 5 through 8 one additional time.
11. Repeat steps 5 through 7 one additional time.
12. Activate Petalmane Baku by paying 1 and removing three ki counters from it, adding .
13. Repeat from step 1.

This ingenious loop turns a cascade of Spirit and Arcane spell-casting into an endless engine, fueled entirely by Ezzaroot Channeler reducing your creature spell costs to zero after you tap it for life. As you repeatedly cast and bounce Ugin's Conjurant and Kiri-Onna, Petalmane Baku quietly accumulates ki counters off every single cast to stockpile massive amounts of color-filtered mana. Meanwhile, Kiri-Onna's entry trigger keeps the 0-mana Ugin's Conjurant cycling safely back to your hand, creating an infinite storm and creature entrance loop that leaves your opponents utterly buried.