Well she could see piranhas in the water. Some of them looked pretty big. In fact, if she could make one of those into a goblet, it would make a decent sized one. But how could she get one? She couldn't just transform a piranha into a goblet, reach into the water and pick it out, nor could she pick the piranha out and transform it outside the water. She had to be able to actually GET the piranha OUT of the water. She had a think. She didn't want to retrieve a live piranha, as it was likely to eat her face. So... so she pulled out her wand, pointed it at a rather large piranha and said "Inflecto Telum," but the arrow missed. She pointed it at the same piranha "Inflecto Telum," she repeated, and the arrow lodged itself through the piranha's open mouth, killing it.

She felt bad about killing an animal, if it actually was dead, but she needed to drink and wash her face down, AND get through the jungle. She couldn't go on without water. But the end of the arrow, which was slightly protruding from the water, fell... So she couldn't pick it up by the end of the arrow. How could she get it out? She didn't feel comfortable with the summoning charm, so she thought she could use the seize and pull charm. Remembering it was a whip like hand action, she said "Carpe Retractum," whipping her wand carefully and directly at the arrowed piranha. Magically, obviously, it whipped back from the water, over Zhenya's head, and landed about a metre behind her.