Wee Witch's Apprentice

2 DARK monsters All DARK monsters on the field gain 500 ATK/DEF, also all LIGHT monsters on the field lose 400 ATK/DEF. If this card is destroyed by battle or card effect: You can target 1 DARK monster in your GY; add it to your hand. You can only use this effect of "Wee Witch's Apprentice" once per turn.