Falco Spara, Pactweaver + Sensei's Divining Top + Yotian Dissident + Ugin, the Ineffable

Falco Spara, Pactweaver

Sensei's Divining Top

Yotian Dissident

Ugin, the Ineffable

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. Cast Sensei's Divining Top from the top of your library by paying 0 and removing a counter from a creature you control.
3. When Sensei's Divining Top enters, Yotian Dissident triggers, putting a +1/+1 counter on Yotian Dissident.
4. Repeat.

This loop turns the top of your library into an endless engine by using Falco Spara, Pactweaver to cast spells from the top of your deck, fueled entirely by the counters you remove as an alternate cost. As you continually recast Sensei's Divining Top for free, its constant reentry triggers Yotian Dissident to reliably replenish those spent counters on itself. Meanwhile, Ugin, the Ineffable works quietly in the background to cheapen your colorless spells—though Sensei's Divining Top already drops to a mana value of zero—while giving you a sturdy backup plan.