Falco Spara, Pactweaver + Sensei's Divining Top + Enthusiastic Mechanaut + Jace's Projection

Falco Spara, Pactweaver

Sensei's Divining Top

Enthusiastic Mechanaut

Jace's Projection

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. Jace's Projection 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 clever loop turns your library's top card into an endless engine by using Falco Spara, Pactweaver's static ability to let you cast spells from the top of your library using counters instead of mana. Sensei's Divining Top is the centerpiece here, easily re-entering the battlefield repeatedly because Enthusiastic Mechanaut reduces its cost to zero, allowing Falco Spara, Pactweaver to pay that new cost simply by stripping a counter off of Jace's Projection. Every time you cycle Sensei's Divining Top this way, Jace's Projection grows larger thanks to the card draw trigger, ensuring you never run out of fodder to remove for Falco Spara, Pactweaver's alternate casting cost.