Nigon is the second underground race.

uh... okay)) I don't know, but the music seems fine as it is...

maybe the Exiled would fit, but not all of them are like that... only some of the people). The other races lived underground or in other planes, dimensions, with teleports to which are located in dungeons... where this race lives). This could also be the Holy Grail (Tear of Ashi), by the way...
the other names aren't very good... we need something else...