Erebos's Emissary [Theros]

Set: Theros Type: Enchantment Creature — Snake Uncommon Cost: {3}{B} Bestow {5}{B} (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 to a creature.) Discard a creature card: Erebos's Emissary gets +2/+2 until end of turn. If Erebos's Emissary is an Aura, enchanted creature gets +2/+2 until end of turn instead. Enchanted creature gets +3/+3.