Talk:Nightmare Despair/@comment-24513812-20140915042245/@comment-6518600-20140915125423

No, you don't use its ability. You merely to use this card, for that monster to attack your opponent, once. You cannot fully command that monster. If you used another copy of this card during the same final phase, yes that card can attack again.

What makes that monster attack is this card, not you command it to attack.