Wise Man Neos (SGX4-ENS05) - Speed Duel GX: Midterm Destruction 1st Edition

"Elemental HERO Neos" and Fusion Monsters that mention "Elemental HERO Neos" as material gain the following effect.
• Before damage calculation, if this card battles an opponent's monster: You can inflict damage to your opponent equal to half that opponent's monster's original ATK.