Nikolo Kotzev is a Bulgarian guitarist, violinist, songwriter and producer, perhaps most famous for his 2001 rock opera Nostradamus and his band Brazen Abbot.

Jørn Marumsrud Lande is a Norwegian hard rock and heavy metal singer. He is known for his work with the bands Ark, Beyond Twilight, Millenium, Vagabond, The Snakes, and most notably with power metal band Masterplan. He is also the most recurrent guest singer of the international supergroup Avantasia, and has worked as lead and guest singer in several projects. Currently, he is focusing his activities on his solo project Jorn. In 2014, Lande was hired by Riot Games to be the voice of the character Karthus, of the fictional heavy metal band Pentakill.