Sensei's Divining Top + Rook Turret + Gran-Gran

Sensei's Divining Top

Rook Turret

Gran-Gran

How it works

1. Cast Sensei's Divining Top by paying 0 due to Gran-Gran.
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 cunning loop transforms the humble Sensei's Divining Top into an engine of endless card selection, all while sitting safely in your library. While Gran-Gran passively discounts your artifact's cost down to zero, Rook Turret watches eagerly, turning every entrance into a chance to cycle cards. When you tap Sensei's Divining Top to draw a card and slide it back to the top of your library, the ensuing Rook Turret trigger intercepts to draw it straight into your hand instead—setting up an infinite cycle of casting, drawing, and looting.