Varon Start! The Mystery of the Armour Deck

Varon tells Mai that when she reaches the common point of “always desiring to win and obtaining power”, she can designate a person. Whether it be Yugi or Jounouchi for whatever reason or no reason if that should be the case, it doesn’t matter. If Mai desires so, she can name either Yugi or Jounouchi as winner to duel Dartz. Just then, Otogi and Rebecca pass by and so the duel between Varon and Rebecca begin. Varon plays a monster in sign of attack but it’s attack power is zero. There must be something more to it. Does it have some special effect?