Falco Spara, Pactweaver + Sensei's Divining Top + The Immortal Sun + Arcbound Crusher

Falco Spara, Pactweaver

Sensei's Divining Top

The Immortal Sun

Arcbound Crusher

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, Arcbound Crusher triggers, putting a +1/+1 counter on Arcbound Crusher.
4. Repeat.

This clever loop turns your library into an endless engine for card draw and artifact triggers by exploiting Falco Spara, Pactweaver's ability to cast spells from the top of your library using creature counters as an alternate cost. Sensei's Divining Top naturally replaces itself by drawing a card and sliding onto the top of your library, allowing you to replay it immediately using the shield or +1/+1 counters provided by your other permanents. Meanwhile, The Immortal Sun quietly reduces that casting cost down to zero, ensuring you never run out of mana to keep the cycle going. As the Top repeatedly enters and leaves the battlefield, Arcbound Crusher grows infinitely large off every single artifact entrance, transforming a simple card-draw loop into a devastatingly huge threat.