Evin, Waterdeep Opportunist is a rare Legendary Creature — Human Rogue card from Universes Within (SLX), collector number 26. Current market price: $11.64, TCGplayer market prices via Scryfall.
Menace Ward—Sacrifice a creature. Evin gets +2/+0 for each Treasure you control. Whenever one or more players sacrifice one or more creatures, you create a tapped Treasure token. This ability triggers only once each turn.