Enraged Battle Ox (Blue) (DL15-EN002) - Duelist League Promo Unlimited

Effect: As long as this card remains face-up on your side of the field, when Beast-Warrior and Winged Beast-Type monsters on your side of the field attack with an ATK that is higher than the DEF of your opponent's Defense Position monster, inflict the difference as Battle Damage to your opponent's Life Points.