Natsu in Charge of Names

Natsu made his wish.

He could now change a woman's viewpoint of herself by saying her name, then the name of an object, animal, or person, and they would change to match the name of the thing he said. He even modified his wish so that it could work on Lucy's Celestial Spirits as well if he chose.

Basically, if he approached Mirajane and said. "Mirajane, you're a prostitute" then Mirajane would fully believe herself to be a prostitute until Natsu gave her her old job back by saying her full name of 'Mirajane Strauss'. Or he could rell rhe Celestial Spirit Virgo to be something outlandish like a table, and she would fully believe herself to be a table until Natsu said her full name. And the rest of the world would view the women as whatever their new occupation was until they werw turned back to normal.

His new powers in hand, Natsu headed back to the guild to test them on some of his female guild mates.