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

Filigree Sages

Prototype Portal

Tanglepool Bridge

Tiller Engine

Biomancer's Familiar

How it works

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

This loop centers around Prototype Portal, which is primed by exalting an artifact like Tanglepool Bridge onto it so you can repeatedly churn out copies for free. When that bridge enters the battlefield, Tiller Engine immediately steps in to untap it, allowing you to tap the Tanglepool Bridge token for mana to fund your engine. Meanwhile, Biomancer's Familiar works behind the scenes to slash the activation cost of Filigree Sages down to just a single blue mana, making the untap cycle sustainable. Finally, Filigree Sages uses that generated mana to untap Prototype Portal, looping the whole process to flood the board with infinite artifacts and landfall triggers.