Discord, whatever did we do To make you take our world away? Discord, are we your prey alone, Or are we just a stepping stone for taking back the throne? Discord, we won't take it anymore So take your tyranny away!
To be honest, nothing can ever beat Discord, he's too pro so his song is also too pro. Luna's IS good though. Nightmare version cause it shows her real feelings better right at the very end.
Discord is an.. everything that's magic and tried to plummet the world into discord and chaos. turning the roads into soap, making it rain chocolate milk non-stop, bears in tutus dancing, the world upside down, etc