Filigree Sages + Prototype Portal + Mistvault Bridge + Tiller Engine + Biomancer's Familiar

Filigree Sages

Prototype Portal

Mistvault Bridge

Tiller Engine

Biomancer's Familiar

How it works

1. Activate Prototype Portal by paying 0 and tapping it, creating a token copy of Mistvault Bridge.
2. When Mistvault Bridge enters the battlefield, Tiller Engine triggers, untapping it.
3. Activate the Mistvault Bridge token by tapping it, adding .
4. Activate Filigree Sages by paying , untapping Prototype Portal.
5. Repeat.

This ingenious loop turns a free-cost imprint into a self-sustaining land generator by exploiting the interaction between Prototype Portal and Mistvault Bridge. Because the imprinted artifact has a mana value of zero, you can repeatedly crank out token copies of the indestructible bridge for no mana at all, while Biomancer's Familiar steps in to slash the activation cost of Filigree Sages down to just a single blue mana. As each new land enters the battlefield, Tiller Engine immediately untaps it to fuel the next cycle, allowing you to pay for the untap using the mana generated by tapping the very same land.