Five editions in, it is easy to accidentally think you know how a rule works. For example, I just found out via another thread that I have been doing saving throws wrong this whole time: a natural 20 does not automatically save in 5E. Huh.
What were you getting wrong because you made an assumption, didn't read closely and/or applied an old rule accidentally?
What were you getting wrong because you made an assumption, didn't read closely and/or applied an old rule accidentally?