Yuna, Grand Summoner is a mythic Legendary Creature — Human Cleric card from Final Fantasy Commander (FIC), collector number 8. Current market price: $3.84 (foil $0.39), TCGplayer market prices via Scryfall.
Grand Summon — {T}: Add one mana of any color. When you next cast a creature spell this turn, that creature enters with two additional +1/+1 counters on it. Whenever another permanent you control is put into a graveyard from the battlefield, if it had one or more counters on it, you may put that number of +1/+1 counters on target creature.