While an "Icejade" monster and "Icejade Cenote Enion Cradle" are on the field, your opponent cannot activate the effects of monsters that were Summoned that turn. When a monster is destroyed by battle involving your "Icejade" monster: You can target 1 of those destroyed monsters; inflict damage to your opponent equal to that monster's original ATK. You can only use this effect of "Icejade Curse" once per turn.