3.5 introduced obyriths, the primordial demons replaced by the tanar’ri. Their Pathfinder analogs are the qlippoth, similarly inhuman beasts with a hatred for mortal life, demons, and daemons alike. The augnagar may be the least intelligent qlippoth (and a cannibal to boot), but it is a savage fighter nonetheless.
Something appalling is nesting under the streets of Shroudport. A beggar boy was nearly driven mad by the sight of it, but the Ragpicker King refuses to let him go to the authorities, for fear of revealing the beggars’ hideout.
A nabasu and an augnagar are squabbling over a patch of the Abyss. The nabasu is too smart to be caught be the qlippoth, but lacks the strength or influence to drive it away.
A gluttonous augnagar is close to its apotheosis into an even deadlier thulgant. A ghaele apothecary has created an ambrosial opal that can stop the transformation, provided he can convince someone to feed the beast the enchanted pill.
—Pathfinder Bestiary 2 219