Falco Spara, Pactweaver + Sensei's Divining Top + Urza, Lord Protector + Oneirophage

Falco Spara, Pactweaver

Sensei's Divining Top

Urza, Lord Protector

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 clever loop relies on Falco Spara, Pactweaver's ability to let you cast spells from the top of your library by trading a counter from a creature you control, completely bypassing traditional mana costs. Sensei's Divining Top fuels this engine by drawing a card and placing itself right back on top of your library, making it immediately available to recast. Meanwhile, Urza, Lord Protector provides a welcome cost reduction, ensuring you have the mana to spare, while Oneirophage happily grows out of control with every single card drawn by the Top.