Falco Spara, Pactweaver + Sensei's Divining Top + Cemetery Prowler + Medusa, Inhuman Queen

Falco Spara, Pactweaver

Sensei's Divining Top

Cemetery Prowler

Medusa, Inhuman Queen

How it works

1. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Cast Sensei's Divining Top by paying 0 and removing a counter from a creature you control.
3. Medusa triggers, putting a +1/+1 counter on it.
4. Repeat.

This clever loop transforms Sensei's Divining Top into a free, endlessly repeatable draw engine by leaning on Falco Spara, Pactweaver to cast it directly from the top of your library for zero mana. The secret to sustaining this loop's cost is Cemetery Prowler, whose passive cost-reduction ability discounts the Top's mana value to zero, entirely bypassing the need to spend real mana while Falco Spara's alternate-cost mechanic simply requires sliding off a counter. Meanwhile, Medusa, Inhuman Queen watches every iteration happen, growing larger with a +1/+1 counter each time you cast the Top as a noncreature spell, turning a utility card recursion trick into a storm-building spectacle.