Iron Maiden - The Alchemist
Classic Maiden as it gets! Underrated song. Love the melodies, tempo and riffs (Janick! what a solo). Catchy vocal parts, the pre-chorus could be an actual chorus. I wish it was played live.
After it: The Final Frontier (so cool), Mother Of Mercy, Isle Of Avalon (lost gem), The Man Who Would Be King (prog!), When The Wild Wind Blows (storytelling mastercraft with both music and lyrics).
edit: more songs from the album should have been played live, they are really interesting. What a vibe they create.