"Uh...it's like..." Ruffnut had to straighten up again and gesture with her hands trying to give an impression of the size,

"It's like a glass ball right? But if you throw it and say where you wanna go it'll open a portal and take you there. It looks like it has snow inside it and-"

A cracking of branches from the nearby trees and she fell silent, waiting, listening for any further indications there were in trouble.

"And the monsters are these shadowy things that want to hurt you, me and anyone they can."she finished. "Except sometimes they look like people I guess? And those are even stronger then the shadowy things."

Ruffnut was ever so helpful.