Undercity Scrounger is a common Artifact Creature — Human Rogue card from Foundations Jumpstart (J25), collector number 501. Current market price: $0.30, TCGplayer market prices via Scryfall.
{T}: Create a Treasure token. Activate only if a creature died this turn. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")