Falco Spara, Pactweaver + Sensei's Divining Top + Umori, the Collector + Chasm Skulker

Falco Spara, Pactweaver

Sensei's Divining Top

Umori, the Collector

Chasm Skulker

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. Chasm Skulker 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 uses Falco Spara, Pactweaver to turn your library's top card into a launching pad, letting you cast Sensei's Divining Top by removing a counter instead of paying its mana cost. Each time you tap Sensei's Divining Top to draw a card, Chasm Skulker happily grows larger with a brand-new +1/+1 counter from the resulting draw trigger. Meanwhile, Umori, the Collector sits quietly in the background, reducing your artifact spell costs to ensure the top-deck casting remains entirely free.