Tuukka Junnikkala Addictive. A powerful, synthetic performance from GUMI that stays with you long after the song is over.
The off-vocal version is also well worth hearing. I've always considered it a measure of a composer's and composition's strength how well the instrumental version of a song with vocals can stand on its own, and this one certainly offers a very satisfying alternative to the original.
Favorite track: A Requiem.