So... riddles. Vivi wasn't exactly the sharpest weapon in the closet at the moment, especially with these kinds of stuff. She'll sort of just let the others answer this for her. But yeah, the answer was water which she now sewed together to connect it to the clues in the riddle. Yeah, yeah. Correct. She smiled.

But... what? Nobody taught her the water-conjuring spell. Vivian opened her mouth, and then closed it again. Nah, she wasn't going to ask how. She thought she should just observe it from the other students. Her mummy did conjure water out of her wand when she watered plants so it probably wasn't as complicated as producing a Patronus or whatever. Aguamenti? Was that the incantation?

Vivi looked closely at the student beside her (hopefully she didn't look like a creep doing that) and followed suit. "Aguamenti," the blonde said, pointing her wand, and a jet of water cam sprinkling out of her wand. YAY, it worked!

Water water water for the plants!