Nemtheanga has seen Obsidian Kingdom 3 times.

Obsidian Kingdom is a music project formed in 2005 in Barcelona. The band plays hard-to-classify and intense music with plenty of contrasts, and its main features are the use of multiple sound resources in order to portray a wide range of emotions, a deep interest for aesthetics and the mise-en-scène, and the sombre and cryptic quality of their lyrical topics. The band's sound has been characterized as drawing equally on progressive rock, post-metal, black metal, alternative rock and electronica.