Fain, the Broker + Dross Scorpion + Biotransference

Fain, the Broker

Dross Scorpion

Biotransference

How it works

1. Activate Fain's third ability by tapping it and sacrificing an creature, which is an artifact due to Biotransference.
2. When the creature dies, Dross Scorpion triggers, untapping Fain.
3. Resolve the Fain ability from step 1, creating a 2/1 Inkling creature token that is an artifact due to Biotransference.
4. Repeat.

This looping engine relies on Biotransference to turn all of your creatures into artifacts, which fundamentally changes how Fain, the Broker and Dross Scorpion interact. Once everything is an artifact, sacrificing a creature to Fain's third ability triggers Dross Scorpion to untap Fain, allowing you to continually feed the loop by turning those sacrifices into flying Inkling tokens.