Falco Spara, Pactweaver + Sensei's Divining Top + Enthusiastic Mechanaut + Machinesmith Automaton

Falco Spara, Pactweaver

Sensei's Divining Top

Enthusiastic Mechanaut

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 clever loop turns the classic Top-into-library trick into an engine by using Falco Spara, Pactweaver to cast Sensei's Divining Top directly from the top of your library for free, bypassing its normal mana cost by trading away a counter. Enthusiastic Mechanaut makes that already-zero cost completely free, while the counters you strip away are continuously replenished because every time Sensei's Divining Top re-enters the battlefield, Machinesmith Automaton triggers to stack up fresh +1/+1 counters on itself. Tapping Sensei's Divining Top to draw a card puts it right back where Falco Spara, Pactweaver can grab it again, creating a self-sustaining cycle that endlessly redraws your deck and triggers your artifact enters-the-battlefield effects.