Filigree Sages + Prototype Portal + Silverbluff Bridge + Tiller Engine + Training Grounds

Filigree Sages

Prototype Portal

Silverbluff Bridge

Tiller Engine

Training Grounds

How it works

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

This clever engine leverages Prototype Portal—with a Silverbluff Bridge imprinted into it—to flood the board with indestructible artifact lands for zero mana. Because the created token enters the battlefield tapped, Tiller Engine triggers to instantly untap it, allowing you to tap the newly minted land for blue mana. You can then channel that mana directly into Filigree Sages to untap Prototype Portal, a process made vastly more efficient thanks to Training Grounds reducing the Sages' activation cost to just one blue mana.