Vata held the bag awkwardly as Twain threw things into it, trying to not think too hard about what was going into it. As he tried to ignore that Twain had put what looked just like a human bone into a bag, he thought about what XIII and Twain had just said. They both mentioned something called a "plane," and XIII said that there was a "dragon" attacking it. He had heard of something called a "dragon" before, and he had a rough idea of what that could be, but he had never heard of a "plane" before, at least, not in the way they were using it. He had never heard the word used before as the name of a physical object, but rather, as an abstract concept used in art and mathematics. While it did not seem like a good time to ask questions, Vata figured this was something he probably needed to know.

"Uh...what exactly is a plane?"