Sensei's Divining Top + Stone Calendar + Rook Turret

Sensei's Divining Top

Stone Calendar

Rook Turret

How it works

1. Cast Sensei's Divining Top by paying 0 due to Stone Calendar.
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 relies on Stone Calendar to completely eliminate the mana cost of Sensei's Divining Top, allowing you to cast it over and over for free. As the Top enters the battlefield, Rook Turret's passive triggered ability rewards you with a draw-and-discard effect whenever another artifact arrives. Before that trigger even resolves, you can tap Sensei's Divining Top to draw a card and place it right back on top of your library, setting up the Rook Turret to draw it back into your hand while fueling your graveyard with endless looting.