Marwyn, the Nurturer [Dominaria]

Set: Dominaria Type: Legendary Creature — Elf Druid Rare Cost: {2}{G} Whenever another Elf enters the battlefield under your control, put a +1/+1 counter on Marwyn, the Nurturer. {T}: Add an amount of {G} equal to Marwyn's power. Midwife to mothers and leader to all.