Isochron Scepter + Call to Glory + Sydri, Galvanic Genius

Isochron Scepter

Call to Glory

Sydri, Galvanic Genius

How it works

1. Activate Sydri's first ability by paying , causing Isochron Scepter to become an artifact creature until end of turn.
2. Activate creatures you control by tapping those, adding 3.
3. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Call to Glory without paying its mana cost, untapping all creatures.
4. Repeat from step 2.

This ingenious loop turns a simple artifact into a self-sustaining powerhouse by utilizing Sydri, Galvanic Genius to temporarily animate Isochron Scepter into an artifact creature. Once the Scepter is alive, it can tap itself to cast the imprinted Call to Glory, which untaps your creatures—including the Scepter itself—readying it to be tapped again for mana while continuously feeding the engine.