Fain, the Broker + Thornbite Staff + Pitiless Plunderer + Bloodflow Connoisseur

Fain, the Broker

Thornbite Staff

Pitiless Plunderer

Bloodflow Connoisseur

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 Bloodflow Connoisseur 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 Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
7. Repeat.