Falco Spara, Pactweaver + Sensei's Divining Top + Stenn, Paranoid Partisan + Machinesmith Automaton

Falco Spara, Pactweaver

Sensei's Divining Top

Stenn, Paranoid Partisan

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. When Sensei's Divining Top enters, Machinesmith Automaton triggers, putting a +1/+1 counter on Machinesmith Automaton.
4. Repeat.

This loop is a masterclass in recycling through the top of your library, fueled by Falco Spara, Pactweaver allowing you to cast spells from there by trading away your creatures' counters instead of paying mana. With Stenn, Paranoid Partisan reducing the artifact's cost to zero, you can play Sensei's Divining Top for free whenever it returns to your library. Tapping the Top draws you a card and puts it right back on top, while its re-entry triggers Machinesmith Automaton to continually grow with fresh +1/+1 counters. Those very counters are then removed to pay for Falco Spara, Pactweaver's alternate casting cost, letting Sensei's Divining Top start the cycle all over again.