Revel in Riches is a rare Enchantment card from Ixalan (XLN), collector number 117. Current market price: $21.24 (foil $21.77), TCGplayer market prices via Scryfall.
Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") At the beginning of your upkeep, if you control ten or more Treasures, you win the game.