The Cyber-Controller is a rare Legendary Artifact Creature — Cyberman card from Doctor Who (WHO), collector number 724. Current market price: — (foil $4.14), TCGplayer market prices via Scryfall.
When The Cyber-Controller enters, each opponent mills X cards. Put all creature cards milled this way onto the battlefield face down under your control. They're 2/2 Cyberman artifact creatures. Other artifact creatures you control get +1/+1.