Nylea's Emissary is a uncommon Enchantment Creature — Cat card from Theros (THS), collector number 168. Current market price: $0.17 (foil $0.42), TCGplayer market prices via Scryfall.
Bestow {5}{G} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Trample Enchanted creature gets +3/+3 and has trample.