Pinnacle Starcage is a rare Artifact card from Secret Lair Promo (SLP), collector number 54. Current market price: $2.94 (foil $12.72), TCGplayer market prices via Scryfall.
When this artifact enters, exile all artifacts and creatures with mana value 2 or less until this artifact leaves the battlefield. {6}{W}{W}: Put each card exiled with this artifact into its owner's graveyard, then create a 2/2 colorless Robot artifact creature token for each card put into a graveyard this way. Sacrifice this artifact.