Falco Spara, Pactweaver + Sensei's Divining Top + The Thirteenth Doctor + Etherium Sculptor

Falco Spara, Pactweaver

Sensei's Divining Top

The Thirteenth Doctor

Etherium Sculptor

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 by paying 0 and removing a counter from a creature you control.
3. The Thirteenth Doctor triggers, putting a +1/+1 counter on it.
4. Repeat.

This clever loop relies on Falco Spara, Pactweaver to fundamentally rewrite how you cast your spells, letting you pay costs by removing counters instead of mana. By tapping Sensei's Divining Top to draw a card and place itself back on your library, you set it up to be continuously recast from the top of your library for free—a cost further smoothed out by Etherium Sculptor reducing artifact expenses. Every time you drop Sensei's Divining Top from anywhere other than your hand, The Thirteenth Doctor's Paradox ability triggers to replace the counter Falco Spara, Pactweaver just removed, ensuring you never run out of fuel to keep casting it.