Falco Spara, Pactweaver + Sensei's Divining Top + Ugin, the Ineffable + Stark's Ingenuity

Falco Spara, Pactweaver

Sensei's Divining Top

Ugin, the Ineffable

Stark's Ingenuity

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. Stark's Ingenuity triggers, putting a +1/+1 counter on the creature it's attached to
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 intricate engine turns your library's top card into an endless loop by leveraging Falco Spara, Pactweaver's ability to cast spells from the top of your library using creature counters as payment. Sensei's Divining Top acts as the core recurring spell, drawing a card to place itself on top while triggering Stark's Ingenuity to constantly replenish the +1/+1 counters that Falco Spara strips away. Meanwhile, Ugin, the Ineffable quietly makes this entire process free by reducing the cost of colorless spells by {2}, allowing you to repeatedly tap and recast the Top without spending any mana.