In the Bestiary they introduce the idea of super outsiders - masters, rulers, paragons, or just real big deals of their respective types - with some sample powers. For devils, they give pit fiends the option of three sample powers: deathmastery, master of magic, or hellfire breath.
They mention, as in all similar entries, that there are more. But what else is out there?
Now, “make up your own” is always an option, but a larger sample size lets us look at what else might be in the ballpark of the intended stuff.
I can think of at least two - one AP spoiler and a certain bound devil in (or under or behind or something) Korvosa.
Anyone know what else there is? Any others?