Alchemax Slayer-Bots is a common Artifact Creature — Robot Villain card from Marvel's Spider-Man Eternal (SPE), collector number 5. Current market price: $0.19 (foil $0.28), TCGplayer market prices via Scryfall.
When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)