Falco Spara, Pactweaver + Sensei's Divining Top + Umori, the Collector + Shang-Chi and the Ten Rings

Falco Spara, Pactweaver

Sensei's Divining Top

Umori, the Collector

Shang-Chi and the Ten Rings

How it works

1. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Shang-Chi and the Ten Rings triggers, putting a +1/+1 counter on it.
3. Cast Sensei's Divining Top from the top of your library by paying 0 and removing a counter from a creature you control.
4. Repeat.

This elegant engine relies on the synergy between Sensei's Divining Top and Falco Spara, Pactweaver, which lets you bypass traditional mana costs by trading creature counters for spells cast from the top of your library. Whenever you tap the Top to draw a card, Shang-Chi and the Ten Rings triggers to grow with a +1/+1 counter, feeding Falco Spara a steady supply of fresh counters to remove. Meanwhile, Umori, the Collector sits quietly in the background, discounting your artifact spells so that casting the Top from the library costs a mere zero mana.