Equip only to a Normal Monster. It gains 500 ATK. When the equipped monster destroys an opponent's monster by battle: You can Special Summon 1 "Phantasm Spiral Dragon" from your hand, Deck, or Graveyard, and if you do, equip this card to it, then inflict 1000 damage to your opponent. You can only use this effect of "Phantasm Spiral Grip" once per turn.