Diabound Kernel (LED5-EN008) - Legendary Duelists: Immortal Destiny 1st Edition

When this card declares an attack: It gains 600 ATK. During your player's turn: You can target 1 face-up monster your opponent controls; Loses it ATK equal to this card's ATK current up to the end of this turn, Then banish this card up to the Standby Phase of the next turn. You can only use this effect of "Diabound Kernel" once per turn .