You can only use the 2nd effect of this card’s name once per turn.
(1) You can only control 1 “Nidhogg, Generaider Boss of Ice”.
(2) When your opponent would Special Summon a monster(s) (Quick Effect): You can Tribute 1 “Generaid” monster or Wyrm monster; negate that Special Summon, and if you do, destroy that monster(s).
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