Polaris live is a bonus disk included in the Polaris 2010 reissue. It is a compilation of many gigs around the Polaris Tour between 2009 and 2010. These were also the last performances Stratovarius made before lowering the tone to their songs. I think this was especially after Kotipelto's vocal injury in 2010. Luckily, I believe this was after Elysium was already finished, that's why Timo's vocals there still sound very clean.