Dross Scorpion + Elemental Mastery + Umbral Collar Zealot + Biotransference

Dross Scorpion

Elemental Mastery

Umbral Collar Zealot

Biotransference

How it works

1. Activate the creature with Elemental Mastery attached by tapping it, creating a number of 1/1 Elemental creature tokens with haste equal to its power.
2. Activate Umbral Collar Zealot by sacrificing an Elemental.
3. When the Elemental dies as an artifact due to Biotransference, Dross Scorpion triggers, untapping the creature with Elemental Mastery attached.
4. Resolve the Umbral Collar Zealot ability.
5. Repeat.

This brilliant engine turns your creature into a relentless token factory by bridging the gap between mana-free sacrifice and untapping shenanigans. Thanks to Biotransference, every single creature you control—including the hasty tokens produced by Elemental Mastery—enters as an artifact, meaning their eventual demise immediately triggers Dross Scorpion to untap your mastery-enchanted powerhouse. You can then feed those freshly generated minions into Umbral Collar Zealot's sacrifice outlet to fuel the loop infinitely, simultaneously digging through your deck with endless surveil triggers while flooding the board.