From publisher blurb: Insidious yet benevolent, the colliatur are denizens of Aventyr born both above and below the surface but made in the Underworld; now they’re ready to become part of your Pathfinder Roleplaying Game! In Underworld Races: Colliatur you’ll find… a brand new player race of transformed humanoids! favored class options for all kinds of PCs! the crystal cannonade gunslinger archetype! new equipment—colliatur shards and colliatur powder! Disposable Parts, Bringer of Light, Nimbus Wielder and more new feats! new magic items like the crystalline implant and merciful shard! alien surge, light of knowledge, crystal expulsion and other new spells!