Falco Spara, Pactweaver + Sensei's Divining Top + Kappa Cannoneer + Gran-Gran

Falco Spara, Pactweaver

Sensei's Divining Top

Kappa Cannoneer

Gran-Gran

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 engine turns a classic library-top loop into a massive threat by leveraging Falco Spara, Pactweaver to cast Sensei's Divining Top directly from the top of your library for the cost of removing a counter. Because Sensei's Divining Top can tap to draw a card and place itself back on top of your library, you can continuously repeat this process without ever actually spending mana to replay it. Meanwhile, Gran-Gran sits on the board looting cards and potentially discounting your noncreature spells, and Kappa Cannoneer grows steadily larger with every single artifact entering the battlefield, turning your looping artifacts into an unblockable, heavily warded giant.