Purphoros's Emissary

Enchantment Creature — Ox

“Bestow 6R (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.) Menace (This creature can't be blocked except by two or more creatures.) Enchanted creature gets +3/+3 and can't be blocked except by two or more creatures.”