Icejade Curse - 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23)

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