Revel in Riches 117/279 (Ixalan)

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.

NM - $37.50
LP - $30.00
MP - $22.50
HP - $15.00
DMG - $7.50