Falco Spara, Pactweaver + Sensei's Divining Top + Uthros Research Craft + Urza, Lord Protector

Falco Spara, Pactweaver

Sensei's Divining Top

Uthros Research Craft

Urza, Lord Protector

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 ingenious loop turns Sensei's Divining Top into a self-replenishing engine by tapping it to draw a card and place itself back on top of your library. Thanks to Falco Spara, Pactweaver, you can bypass its mana cost entirely by casting it directly from the top of your library while paying the price with a counter instead—which Uthros Research Craft happily provides, generating a charge counter every time you cast an artifact spell and drawing you yet another card in the process. Meanwhile, Urza, Lord Protector quietly reduces the strain on your resources by making your spells cheaper, ensuring the whole apparatus runs smoothly without draining your mana.