Collector's Case is a common Artifact card from Marvel Super Heroes Commander (MSC), collector number 617. Current market price: $0.25 (foil $0.29), TCGplayer market prices via Scryfall.
When this artifact enters, tap up to one target creature and put two stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.) {3}{U}, {T}: Tap target creature.