RED update thoughts and feedback

okay. It doesn't matter which MB you have (20 or 30) in your possession when trading it in. If you choose 30, you'll get the new MB30 for whichever MB that is eligible in your inventory. If you pick 20, you'll get the new MB20.

I think they're only eligible if they are for a skill that's not available anymore.

Are you talking about the old 4 options because I can get the new Mastery Book 20 by trading in Guardian 20 or Guardian 30 for example.

And I can trade in Advanced Blessing 30 considering that its level has decreased from 30 to 20.