Falco Spara, Pactweaver + Sensei's Divining Top + Stone Calendar + Forgotten Ancient

Falco Spara, Pactweaver

Sensei's Divining Top

Stone Calendar

Forgotten Ancient

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. Forgotten Ancient triggers, putting a +1/+1 counter on it.
4. Repeat.

This clever loop turns your library into a self-sustaining engine by letting you repeatedly draw and recast Sensei's Divining Top entirely for free. The magic happens because Stone Calendar discounts the Top's mana cost down to zero, allowing Falco Spara, Pactweaver to bypass traditional mana payments altogether by simply stripping counters off your creatures instead. Meanwhile, Forgotten Ancient acts as the ultimate battery for this loop, collecting fresh +1/+1 counters with every spell you cast so that Falco Spara always has a steady supply of fuel to keep the Top coming back.