There's something strange but beautiful about "Ikaros", the opening song. It's subdued, but incredibly sentiment inspiring just the same -- like the musical equivalent of the Aurora Borealis.
I can literally listen to the melody refrain at 4:10 for literally hours on repeat.
The ending to "Simian Hive" threw me for a loop the first time I heard it. It has the same, inescapable feeling of an epic and unstoppable marching force, advancing purposefully ever onward that the ending of "Sentenced To Eternal Life" fills me with, like something out of the climax of an action movie.
