Selvala, Eager Trailblazer [Outlaws of Thunder Junction]

Set: Outlaws of Thunder Junction Type: Legendary Creature — Elf Scout Rarity: Mythic Cost: {2}{G}{W} VigilanceWhenever you cast a creature spell, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."{T}: Choose a color. Add one mana of that color for each different power among creatures you control.