You can only Special Summon this card’s name by way of its 1st effect once per turn.
(1) If there is a face-up card in the Field Zone, you can Special Summon this card (from your hand).
(2) Monsters your opponent controls cannot activate their effects on the field while “Inion Cradle the Icejade Depths” is on the field, except the turn they were Summoned.
(3) If your “Icejade” monster battles an opponent’s monster, that opponent’s monster loses 1000 ATK during damage calculation only.