Falco Spara, Pactweaver + Sensei's Divining Top + The Immortal Sun + Lorescale Coatl

Falco Spara, Pactweaver

Sensei's Divining Top

The Immortal Sun

Lorescale Coatl

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. Lorescale Coatl triggers, putting a +1/+1 counter on it.
3. Cast Sensei's Divining Top from the top of your library by paying 0 and removing a counter from a creature you control.
4. Repeat.

This loop turns Sensei's Divining Top into a self-sustaining engine by letting you repeatedly draw it and cast it for free. Falco Spara, Pactweaver is the linchpin that allows you to cast the Top directly from the top of your library, paying its mana cost of zero by simply removing a counter from a creature you control instead. Meanwhile, The Immortal Sun reduces that casting cost by {1} to make it entirely free, while Lorescale Coatl feeds right back into the engine by growing a fresh +1/+1 counter every single time you draw a card—replacing the exact counter you just removed to keep the chain going indefinitely.