I don’t think the recommendation is about knowing the rules.
I think it’s recommended that Dark Urge is only played after your first play through because something with the character is going to drastically change the story and your decisions. Just judging from the name alone it sounds like you’re going to have to fight against the character to make decisions in the game that aren’t evil or what not.
Lol I do the same. Went from “what is this? It doesn’t do anything why is this here?” to doing doing it every turn because I’m a god damn bard.
My favorite is that if you get hit the song gets interrupted for the rest of the turn. Like it was actually doing anything to begin with. I guess it makes me want to get some serious revenge.