Atrixyl

Very rarely, when sinspawn (Monster Core 310) sacrifce sentient beings to runewells, instead of sinspawn, an altogether different sort of aberration is created. Atrixyls are insectile humanoid warriors, whose powers are similar to yet stronger than ordinary sinspawn, and who are dedicated to destroying runewells and similar feshwarping artifacts. Some atrixyls seek to destroy runewells due to an imprinting of pain and suffering that occurs during their creation, seeking to prevent future suffering from runewells. Others seek to break a runewell and tap into its magical energies to gain personal power. This relentless mission has earned them the epithet "runebreakers," and brings them into confict with the sinspawn whose existences depend upon these runewells.

Atrixyls traverse Golarion's ruined wastelands in search of both ancient runewells and more contemporary feshwarping facilities.