Doc Ock's Tentacles is a rare Artifact — Equipment card from Marvel's Spider-Man (SPM), collector number 277. Current market price: $0.49 (foil $0.73), TCGplayer market prices via Scryfall.
Whenever a creature you control with mana value 5 or greater enters, you may attach this Equipment to it. Equipped creature gets +4/+4. Equip {5}