It is a well-known kind of science in my world in which matter can be changed by using a form of energy. In alchemy, we call them transmutations, and by understanding the properties that something is made of you can alter it or even produce a new material. There are different kinds of alchemists where I'm from, but my brother and I are mainly skilled in plant-based alchemy.

[He stops himself suddenly] I-I'm sorry, I'm just rambling. I didn't mean to make such a long explanation.