Falco Spara, Pactweaver + Sensei's Divining Top + Cheering Fanatic + The Astonishing Ant-Man

Falco Spara, Pactweaver

Sensei's Divining Top

Cheering Fanatic

The Astonishing Ant-Man

How it works

1. Declare Cheering Fanatic as an attacker. When it triggers, choose to name "Sensei's Divining Top".
2. 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.
3. The Astonishing Ant-Man triggers, putting a +1/+1 counter on it.
4. Cast Sensei's Divining Top from the top of your library by paying 0 and removing a counter from a creature you control.
5. Repeat from step 2.

This ingenious engine turns your library's top card into a revolving door by leveraging Falco Spara, Pactweaver's ability to cast spells using counters instead of mana, provided you can continually supply a counter. Sensei's Divining Top naturally resets itself onto your library while drawing you a card, which in turn feeds a +1/+1 counter onto The Astonishing Ant-Man. To make this loop cost nothing, Cheering Fanatic steps in by reducing the Top's casting cost to zero, allowing you to repeatedly strip the newly placed counter off The Astonishing Ant-Man to recast the artifact and trigger the cycle anew.