Falco Spara, Pactweaver + Sensei's Divining Top + Umori, the Collector + Baxter, Fly in the Ointment

Falco Spara, Pactweaver

Sensei's Divining Top

Umori, the Collector

Baxter, Fly in the Ointment

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. Baxter 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 turns your library's top card into a revolving door by leveraging Falco Spara, Pactweaver's ability to cast spells from the top of your library using creature counters as payment. You tap Sensei's Divining Top to draw a card and place itself back on top of your library, which immediately triggers Baxter, Fly in the Ointment to stack up another +1/+1 counter every time you draw. You can then recast Sensei's Divining Top for free by plucking away one of those newly minted counters—a cost reduction further complemented by Umori, the Collector making your chosen spell type even cheaper. Repeat this sequence to churn through your entire deck, generating infinite artifact triggers and card draw.