Falco Spara, Pactweaver + Sensei's Divining Top + Helm of Awakening + Kappa Cannoneer

Falco Spara, Pactweaver

Sensei's Divining Top

Helm of Awakening

Kappa Cannoneer

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, Kappa Cannoneer triggers, putting a +1/+1 counter on Kappa Cannoneer.
4. Repeat.

This loop is powered by Falco Spara, Pactweaver, whose static ability lets you cast spells straight from the top of your library by trading a counter from a creature instead of paying mana. Sensei's Divining Top effortlessly feeds this engine by drawing a card and placing itself back on top of your library, where it can be recast immediately. With Helm of Awakening reducing that casting cost to zero, the mana requirement disappears entirely. Meanwhile, Kappa Cannoneer sits back and happily gorges on the endless parade of artifact entries, growing monstrously large and unblockable with every single loop iteration.