Falco Spara, Pactweaver + Sensei's Divining Top + Glaring Fleshraker + Ravenhill Flock

Falco Spara, Pactweaver

Sensei's Divining Top

Glaring Fleshraker

Ravenhill Flock

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. Ravenhill Flock triggers, putting a +1/+1 counter on it.
3. Cast Sensei's Divining Top from the top of your library by paying 1 and removing a counter from a creature you control.
4. Glaring Fleshraker's first ability triggers, creating a 0/1 Eldrazi Spawn creature token.
5. When the Eldrazi Spawn enters, Glaring Fleshraker's second ability triggers, dealing 1 damage to each opponent.
6. Activate the Eldrazi Spawn by sacrificing it, adding C.
7. Repeat.

This loop turns your library into a self-sustaining engine by letting Sensei's Divining Top repeatedly draw itself and glide right back to the top of your deck. Falco Spara, Pactweaver is the linchpin that allows you to recast the Top from the top of your library without paying traditional mana, fueled instead by stripping a counter off of Ravenhill Flock—which conveniently grows larger from the card draw anyway. Meanwhile, every time you recast the artifact, Glaring Fleshraker spots the colorless spell to churn out an Eldrazi Spawn token, which can then be sacrificed for the mana needed to activate the Top while simultaneously roasting your opponents with direct damage.