What would a Rogue of Space’s powers entail? Also, what would a Bard of Doom’s fully realized ability be?

I’ve already talked about the Rogue of Space quite a bunch. And I’ve said a few things about the Bard of Doom! But not too much. I mean there’s a lot of different takes on what their abilities could be, I believe I’ve talked about Destroying Destruction with the Prince of Doom perhaps? The Bard would be similar, preventing bad things from happening is likely. They’d, conversely, also be the most aggressive when it comes to Destroying things- Destroying through Doom after all makes it sound like it’d be Destruction^2. Bringing pain and bad things upon their foes, causing things to break. You know, classic Bards.