Some Information about Guild of Guardians are also revealed / clarified when Josiah answers questions in the discord.
It is hard to keep track of all these informations because the questions and answers may happen at difference time, and there are hundreds of these messages by Josiah.
With that said, you may be able to find more information about specific gameplay concepts in Guild of Guardians by exploring these discussions yourself. And, you can do so by utilizing discord's powerful search feature which can help you look for every information you may be looking for.
Did you know that using Search, you can find messages by their date, content, from, to, channel?
Check out this documentation by Discord on how you can fully utilize the search feature.