P is for Profundity

[ over the course of the month of April, I shall be posting a topic for each letter of the alphabet, sequentially, every day of the week except Sunday. Our topic for the month is Advanced Dungeons & Dragons : how to approach it, how to run it, how to enjoy a system that deserves to be played NOW, nearly 50 years after its inception. Consider this a 'crash course' in the subject ] P is for…