H - Heated Heart (DP03-EN016) - Duelist Pack 3: Jaden Yuki 2 1st Edition

Select 1 face-up monster you control. It gains 500 ATK. During battle between that attacking card and a Defense Position monster whose DEF is lower than the ATK of that card, inflict the difference as Battle Damage to your opponent. These effects continue until the end of this turn.