In some cases, you can see a skill from a mastery available in the quick slot bar of a character that uses a different mastery.
I’ve yet to figure out how to reproduce it… happens with some skills but not others. Some of these had a default 1 point in them in the classtree file.
Some were modified skills and one was completely new. So I’m lost on how to reproduce it.
For example I made a hidden passive that grants dualwielding in Soldier. Starting a fresh new character I can already dual wield.