Keeper of the Seven Keys is amazing. The structure, vocals and well fuck the vocals again make it one must-hear metal classic. The whole album(s) got a few weak songs but overall I don't really disagree with people who say it's the best power metal album ever. The stand-out song for me, besides Keeper of the Seven Keys and Halloween (the song), is this one: This song could just as well have been the climatic ending to an epic 1-hour song or something. Only Blind Guardian's Nightfall in Middle-earth can compete but that's also because of nostalgia. Mirror Mirror is indisputably one of the best power metal songs of all time however. It has everything you can ask from a power metal song. Nerdish-fantasy-badass-cheesy as fuck lyrics, speed and brilliant melodies (the whole fucking crowd 'sing' the guitar melodies when they play this live).