Lol this. Could also add Rose of Pain as another one of their progressive songs. But Art of Life is actually rated the best song ever by some music critic sites. I know there are others in this forum who would agree. They outsell the biggest acts Kiss, Rolling Stones, Beatles etc combined in Japan, if not in other places in Asia at large. They've also done many different styles ranging from punk to Jrock (as one of it's forefathers, creating a new genre called Visual Kei), folk, glam, hard rock, french experimental, industrial, melodic, power metal, progressive metal etc.