Elements, whose title track I’ve featured in the past, is one of my favourite Stratovarius albums; I find that the symphonic orchestration really brings out the epic feel that Stratovarius tries to materialize in their work.
“Papillon” (the word is French for “butterfly”) is particularly memorable to me due to the intensity of the orchestrated section that comes in around 2:12 and again around 4:34.
Here it is, set by a fan to a haunting slideshow of images:
Lyrics can be found here.
Stratovarius have also released a French version of this song.