Sensei's Divining Top + Ugin, the Ineffable + Rook Turret

Sensei's Divining Top

Ugin, the Ineffable

Rook Turret

How it works

1. Cast Sensei's Divining Top by paying 0 due to Ugin, the Ineffable.
2. When Sensei's Divining Top enters, Rook Turret 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 Rook Turret 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 transforms a humble artifact into an infinite engine by leveraging Ugin, the Ineffable to reduce the cost of Sensei's Divining Top down to zero. Once the Top is cast for free, Rook Turret seizes the moment to trigger its looting ability whenever the artifact enters the battlefield. By tapping Sensei's Divining Top in response to that trigger, you draw a card and slide the Top back to the top of your library just in time for the Rook Turret effect to draw it right back out, letting you cycle through your deck endlessly by discarding the extra cards you don't need.