Sensei's Divining Top + Jhoira's Familiar + Rook Turret

Sensei's Divining Top

Jhoira's Familiar

Rook Turret

How it works

1. Cast Sensei's Divining Top by paying 0 due to Jhoira's Familiar.
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 ingenious loop turns a simple artifact into a self-sustaining engine by manipulating the top of your library in response to its own entry. Jhoira's Familiar is the quiet enabler here, making Sensei's Divining Top entirely free to cast, which allows you to continually cycle it without spending mana. Meanwhile, Rook Turret capitalizes on every single iteration by triggering whenever the Top re-enters, letting you loot through your entire deck while feeding your graveyard.