Sensei's Divining Top + Transplant Theorist + Cemetery Prowler

Sensei's Divining Top

Transplant Theorist

Cemetery Prowler

How it works

1. Cast Sensei's Divining Top by paying 0 due to Cemetery Prowler.
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 turns the unassuming artifact Sensei's Divining Top into a self-sustaining engine by removing its mana cost entirely, thanks to Cemetery Prowler passively discounting it to zero. Whenever Sensei's Divining Top enters the battlefield, Transplant Theorist triggers to let you loot, but before that trigger resolves, you tap the Top to draw a card and place itself back on top of your library. When the Transplant Theorist trigger finally resolves, you draw Sensei's Divining Top right back into your hand—ready to be recast for free—while feeding your graveyard with the discarded card.