Doc Ock, Sinister Scientist is a common Legendary Creature — Human Scientist Villain card from Marvel's Spider-Man (SPM), collector number 29. Current market price: $0.13 (foil $0.22), TCGplayer market prices via Scryfall.
As long as there are eight or more cards in your graveyard, Doc Ock has base power and toughness 8/8. As long as you control another Villain, Doc Ock has hexproof. (He can't be the target of spells or abilities your opponents control.)