Frankenstein's Monster is a rare Creature — Zombie card from The Dark (DRK), collector number 45. Current market price: $7.43, TCGplayer market prices via Scryfall.
As this creature enters, exile X creature cards from your graveyard. If you can't, put this creature into its owner's graveyard instead of onto the battlefield. For each creature card exiled this way, this creature enters with a +2/+0, +1/+1, or +0/+2 counter on it.