Falco Spara, Pactweaver + Sensei's Divining Top + Foundry Inspector + Arcbound Crusher

Falco Spara, Pactweaver

Sensei's Divining Top

Foundry Inspector

Arcbound Crusher

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, Arcbound Crusher triggers, putting a +1/+1 counter on Arcbound Crusher.
4. Repeat.

This engine sets up a self-sustaining loop by turning Sensei's Divining Top into a free top-deck cast, fueled by Falco Spara, Pactweaver's ability to substitute any creature's counter as an alternate payment. Foundry Inspector steps in to slash the artifact's mana cost down to zero, ensuring you never run out of resources to replay it. Meanwhile, every iteration of drawing and recasting the Top feeds Arcbound Crusher with a fresh stream of artifact triggers, rapidly growing it while you cycle through your entire library.