Fain, the Broker + Thornbite Staff + Pitiless Plunderer + Grimgrin, Corpse-Born

Fain, the Broker

Thornbite Staff

Pitiless Plunderer

Grimgrin, Corpse-Born

How it works

1. Activate Fain's third ability by tapping it and sacrificing another artifact, creating a 2/1 Inkling creature token.
2. Activate Grimgrin by sacrificing the Inkling.
3. When the Inkling dies, Fain and Pitiless Plunderer trigger.
4. Resolve the Fain trigger, untapping it.
5. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
6. Resolve the Grimgrin ability
7. Repeat.