Deep Gnome

Deep gnomes, or svirfneblin, are natives of the Underdark and are suffused with that subterranean realm’s magic. They can supernaturally camouflage themselves, and their svirfneblin magic renders them difficult to locate. These abilities have enabled them to survive for generations among the perils of the Underdark.
Like other gnomes, deep gnomes can live for centuries, up to 500 years.