Muse – Mercy (Vocal Cover by Polar) Sep 15, 2015 Black Magic, Cover, Cover Heavy, Cover Heavy Metal, Cover Mercy, Witchburner + Bonus, Muse – Mercy (Vocal Cover by Polar) citizenrecords@gmail.com. Like 0 Thanks! You've already liked this « Polar Bear Club „Ten Minutes“ (Get Up Kids cover) » Polar Bear Club, „Boxes“ Drum Cover