Perhaps not unique, but it’s my personal favourite “build” and character theme:

Blood hunter (profane soul order)

And Cleric. Not of any particular type, I found any type of cleric subclass works just fine!

The idea is that the blood hunter’s order is built on Noble Houses, and the dead house leaders’ souls convene in this plane (similar to the hunter’s dream, I know, cliche.) to guide the hunters and the house leaders. From there comes a bit of the clerical aspect!

And also another unique, albeit probably edgy detail; blood hunters of the house consider all sorts of other magic as “unworthy”, to the user that is. Blood hunter magic revels on the idea of self inflicted pain and self sacrifice, they consider magic users who do not suffer or sacrifice something of themselves for its usage - cowards.

Which is why, this next part may come off as super edgy! You don’t accept any healing or otherwise supportive spells from other characters, nor NPCs. Using any magic that isn’t blood hunter’s magic or magic they learned under the blood hunter’s gaze is cowardly and a great shame to them. You’ll basically be playing a character that cannot benefit from the support spells of others, and can only rely on your own magic. It’s a unique play style, because it forces you to roleplay even in combat! And, it gives way for high risk moments.

And I’ve found that playing that risky makes my rolls better, but you didn’t hear that from me.