This is how The Overlord vs. Discord goes in My Little Pony Transformers Prime: Twilight's Kingdom.
[The Overlord drains a unicorn's magic using his tentacles and grows more stronger. He sees another unicorn and prepares to drain his magic with his tentacles when the unicorn reveals itself to be Discord]
Discord: The Overlord, I presume?
The Overlord: Discord, You're free?
Discord: As a bird.
The Overlord: I commend you on your escape.
Discord: I'm afraid the feeling isn't mutual.
[Discord snaps his fingers and chain appear on the Overlord's arms. The Overlord tries to blast Discord but he can't]
The Overlord: Oh, I should have known you would want to have Equestria all to yourself.
Discord: Oh, I'm not doing this for me. I'm doing it for my friends. [hushed] Just between the two of us, it's mostly for Fluttershy. [squee]
The Overlord: Fluttershy? You're not saying you're friends with ponies?
The Overlord: I am surprised that
Discord: I have done nothing of the sort!
The Overlord: I could , but I need you to send a message to Twilight Sparkle. Tell her