All ten of the fetch lands were the highlight, but also stuff like the allied-colour bond lands (the enemy-colour ones wouldn't be released until Commander Legends later that year), Wasteland, Strip Mine, and Valakut the Molten Pinnacle
The use of all his abilities working in harmony makes him a winning combination, and more than earns his high placement here
Song cards are cards that can be played for free if sung by an active character of a specified cost
The Brothers' War was the set prior to Phyrexia: All Will Be One, so you'll be getting some newer cards that can also be used in standard formats if you want
Ivalice Chronicles lets you at least go back to the world map (while resetting your entire progress) if you're stuck though
Plus, thanks to his Shift ability, you can bring him onto the field early, and his Evasive keyword means your opponent will need another Evasive character to deal with him