Falco Spara, Pactweaver + Sensei's Divining Top + Oneirophage + Temur Battlecrier

Falco Spara, Pactweaver

Sensei's Divining Top

Oneirophage

Temur Battlecrier

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 to let you cast Sensei's Divining Top directly off the top of your library without paying its mana cost, replacing the payment instead by removing a counter from a creature you control. You can tap that same Sensei's Divining Top to draw it right back onto the top of your library, triggering Oneirophage to grow larger with a fresh +1/+1 counter each time you draw. Meanwhile, Temur Battlecrier helps power down the chain by making your spells cost less based on your heavy hitters, though Falco Spara, Pactweaver's alternative cost handles the heavy lifting of casting the Top over and over again.