Fain, the Broker + Intruder Alarm + Encroaching Mycosynth

Fain, the Broker

Intruder Alarm

Encroaching Mycosynth

How it works

1. Activate Fain's third ability by tapping it and sacrificing an artifact, creating a 2/1 Inkling creature token that is an artifact due to Encroaching Mycosynth.
2. When the Inkling enters the battlefield, Intruder Alarm triggers, untapping all creatures.
3. Repeat.

This mesmerizing loop relies on **Encroaching Mycosynth** to fundamentally rewrite the nature of your battlefield, turning all your nonland permanents and entering creatures into artifacts alongside their other types. Once this foundation is laid, **Fain, the Broker** can tap to sacrifice an artifact and churn out a 2/1 white and black Inkling creature token, which immediately triggers **Intruder Alarm** because of its new artifact-creature status. That global untap sweeps across the board, refreshing Fain so you can repeat the sacrifice endlessly.