Fain, the Broker + Intruder Alarm + Pitiless Plunderer + Umbral Collar Zealot

Fain, the Broker

Intruder Alarm

Pitiless Plunderer

Umbral Collar Zealot

How it works

1. Activate Fain's third ability by tapping it and sacrificing another artifact, creating a 2/1 Inkling creature token.
2. When the Inkling enters the battlefield, Intruder Alarm triggers, untapping all creatures.
3. Activate Umbral Collar Zealot by sacrificing the Inkling.
4. When the Inkling dies, Pitiless Plunderer triggers, creating a Treasure token.
5. Resolve the Umbral Collar Zealot ability
6. Repeat.

This clever loop turns Fain, the Broker and Umbral Collar Zealot into a relentless factory for sacrifices by leveraging Intruder Alarm's global untap trigger whenever a new creature enters the battlefield. Every time you craft an Inkling token with Fain, Intruder Alarm springs to action to untap your board, allowing you to feed that very same token to Umbral Collar Zealot for a quick surveil. As your Inkling hits the graveyard, Pitiless Plunderer steps in to reward the loss with a shiny new Treasure token to sustain your mana.