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

Falco Spara, Pactweaver

Sensei's Divining Top

Ugin, the Ineffable

Oneirophage

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. Oneirophage 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 engine turns your library into a self-sustaining draw engine by letting you cast Sensei's Divining Top over and over again for free. Falco Spara, Pactweaver provides the crucial alternative casting cost, allowing you to pay for the Top simply by stripping counters off your creatures rather than spending mana. Meanwhile, Ugin, the Ineffable reduces the cost of the artifact to zero, ensuring you never run out of resources to replay it. As you repeatedly draw and recast the artifact, Oneirophage happily feeds on the activity, growing larger with every single card drawn.