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

Falco Spara, Pactweaver

Sensei's Divining Top

Ugin, the Ineffable

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 clever loop turns Sensei's Divining Top into a free, infinitely repeatable engine by leveraging Falco Spara, Pactweaver's ability to cast spells from the top of your library using creature counters as an alternate payment. Ugin, the Ineffable provides the crucial cost reduction that makes Sensei's Divining Top entirely free to recast, while Arcbound Crusher happily grows into a colossal threat by feeding on the endless procession of entering artifacts. Whenever you need to fuel Falco Spara, Pactweaver with counters again, the counters provided by Arcbound Crusher's modular ability and growth ensure you never run out of sacrifices.