Falco Spara, Pactweaver + Sensei's Divining Top + Glaring Fleshraker + Machinesmith Automaton

Falco Spara, Pactweaver

Sensei's Divining Top

Glaring Fleshraker

Machinesmith Automaton

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

This brilliant loop is built around the ability granted by Falco Spara, Pactweaver to cast spells from the top of your library by removing a creature's counter, turning Sensei's Divining Top into a zero-mana spell that continually draws itself while replacing its own cost. Every time you recast the Top, Glaring Fleshraker spots the colorless spell and rewards you with an Eldrazi Spawn token, which in turn triggers its own ping ability to steadily drain your opponents' life totals. Meanwhile, Machinesmith Automaton watches the continuous influx of artifacts by growing larger with every iteration, keeping the engine running entirely self-sufficiently as you draw your entire deck.