Generous Plunderer is a mythic Creature — Human Rogue card from The Big Score (BIG), collector number 41. Current market price: $46.05 (foil $72.62), TCGplayer market prices via Scryfall.
Menace At the beginning of your upkeep, you may create a Treasure token. When you do, target opponent creates a tapped Treasure token. Whenever this creature attacks, it deals damage to defending player equal to the number of artifacts they control.