When Gaia the Fierce Knight, Swift Gaia the Fierce Knight or Gaia the Dragon Champion on your side of the field attacks a Defense Position monster, if the ATK of that card is higher than the DEF of the Defense Position monster, inflict the difference as Battle Damage to your opponent's Life Points. If Gaia the Dragon Champion inflicts Battle Damage with this effect, draw 2 cards from your Deck and discard 1 card from your hand.