Golgari Thug is a rare Creature — Human Warrior card from Secret Lair Drop (SLD), collector number 7. Current market price: $5.14, TCGplayer market prices via Scryfall.
When this creature dies, put target creature card from your graveyard on top of your library. Dredge 4 (If you would draw a card, you may mill four cards instead. If you do, return this card from your graveyard to your hand.)