The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Unless my memory fails me, it's in the 6th chapter of the 3.5 DMG. It isn't in the SRD, and it was in second chapter of the 3.0 DMG. They keep moving it!