Question: What was the nationality of the musician who made a guest appearance on 3 tracks in Skeletons & Majesties Live? 
Sentence (from "Skeletons &amp; Majesties Live"): The album was recorded during Gamma Ray's 2011 concert in Pratteln (Switzerland) and contains acoustic renditions of the songs "Rebellion in Dreamland" and "Send Me a Sign" as well as the guest appearance of ex-Helloween and current Unisonic vocalist Michael Kiske on 3 tracks.
Relevant evidence: Yes