Falco Spara, Pactweaver + Sensei's Divining Top + Uthros Research Craft + Starnheim Courser

Falco Spara, Pactweaver

Sensei's Divining Top

Uthros Research Craft

Starnheim Courser

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 Diving Top from the top of your library by paying 0 and removing a charge counter from Uthros Research Craft.
3. Uthros Research Craft triggers, putting a charge counter on it and causing you to draw a card.
4. Repeat.

This elegant engine uses Falco Spara, Pactweaver to bypass traditional mana costs by letting you cast spells off the top of your library using counters instead, perfectly fueling Sensei's Divining Top's constant recycling back onto your library. Meanwhile, Starnheim Courser steps in as a vital cost reducer to make casting that Top completely free, ensuring you never run out of resources. Finally, Uthros Research Craft rewards this endless loop by triggering its ability whenever you cast an artifact spell, netting you infinite card draw and charge counters as the entire machine spins out of control.