Vazi, Keen Negotiator is a rare Legendary Creature — Human Advisor card from New Capenna Commander (NCC), collector number 92. Current market price: $0.29 (foil $0.41), TCGplayer market prices via Scryfall.
Haste {T}: Target opponent creates X Treasure tokens, where X is the number of Treasure tokens you created this turn. Whenever an opponent casts a spell or activates an ability, if mana from a Treasure was spent to cast it or activate it, put a +1/+1 counter on target creature, then draw a card.