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

Falco Spara, Pactweaver

Sensei's Divining Top

The Immortal Sun

Oneirophage

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. Oneirophage 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 engine turns a simple artifact into a self-sustaining loop by letting you constantly recast it from the top of your library using Falco Spara, Pactweaver's ability to pay for spells with creature counters instead of mana. To make this free and continuous, The Immortal Sun is essential, as its passive cost-reduction lowers Sensei's Divining Top's casting cost down to zero so you never run out of resources. Each time you tap the Top to draw and tuck it back onto your library, Oneirophage happily triggers to accumulate a growing collection of +1/+1 counters—which Falco Spara, Pactweaver can immediately consume as fuel to replay the Top all over again.