Honest (2020 Reprint) [LODT-EN001] Secret Rare

During your Main Phase, you can return this card from the field to it's owner's hand. During either player's Damage Step, when a face-up LIGHT monster battles you control, you can send this card from your hand to the Graveyard to have that monster gain ATK equal to the ATK of the opponent's monster it is battling, until the End Phase.