PL 9 Unlock - Citzal's Enchanted Armory || I foresee a must-have for fighter/wizard.
PL 9 Unlock - Whirling Dervish || some love for close combat rangers !
PL 9 Unlock - Sacred Sacrifice
PL 9 Unlock - Divine Immolation || Paladins are fucking maniacs.
PL 9 Unlock - Exploding Palm || A monk life is indeed a lonely life.
PL 9 Unlock - Chopping Wood || To the contrary of the fighter, who fucks like crazy.
Xoti is a priestess of Gaun, so that isn't a mystery. If the spoiler subclass is only for an incidental NPC, why does it unlock stuff every level? It seems playable.
Unless it has to do with respec, or the fact that companions join at level 1.
Or maybe, it's more probably an optional multi-class option as stated before.