Sensei's Divining Top + Transplant Theorist + Umori, the Collector

Sensei's Divining Top

Transplant Theorist

Umori, the Collector

How it works

1. Cast Sensei's Divining Top by paying 0 due to Umori.
2. When Sensei's Divining Top enters, Transplant Theorist triggers.
3. Holding priority, activate Sensei's Divining Top by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
4. Resolve the Transplant Theorist trigger, causing you to draw Sensei's Divining Top from your library, and then discard a card other than Sensei's Divining Top.
5. Repeat

This clever loop relies on Umori, the Collector to discount artifact spells down to zero mana, allowing you to cast Sensei's Divining Top for free as many times as you like. Every time the Top enters the battlefield, Transplant Theorist triggers to let you loot—drawing a card and discarding one. By tapping Sensei's Divining Top in response to its own entry trigger, you cleverly place it back on top of your library just in time to draw it with Transplant Theorist's ability, creating a seamless and self-sustaining engine of endless card filtering.