Falco Spara, Pactweaver + Sensei's Divining Top + Ugin, the Ineffable + Clinquant Skymage

Falco Spara, Pactweaver

Sensei's Divining Top

Ugin, the Ineffable

Clinquant Skymage

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. Clinquant Skymage 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 loop transforms Sensei's Divining Top into a self-replacing engine by leveraging Falco Spara, Pactweaver's ability to cast spells from the top of your library using creature counters as an alternative cost. Because Ugin, the Ineffable reduces the cost of colorless spells by {2}, Sensei's Divining Top becomes completely free to cast from the top of your library. Whenever you tap the Top to draw and put it back, Clinquant Skymage dutifully collects a +1/+1 counter from the draw trigger, instantly supplying the exact resource Falco Spara, Pactweaver needs to fuel the next casting of Sensei's Divining Top.