She returned to the guild. After finding her attack to be only highly effective against the river slime, she returned to the library to read more about them. Opening the entry about slime give her something to note.
Some of them were weak to the alkaline substance. That meant she could help deliver any kind of those things, as long as the substance dissolved in the water. If the adventurer guild had prepared them, she would be able to float above them and deliver them either in the form of water mist, rain, or just throw it as a large body of water, as her hydrokinesis let her. Meanwhile, for the moment, she willed the water that made up her body to self-ionize, making her limb more concentrated with OH- and her body to majorly consist of H3O+. At least, this way she would test whether the ice needle she had would be more harmful.
Making a note to the guild receptionist, she left to the southern wall.