Why has no one ever tried capturing two unknown mythological creatures with untold powers of destruction? Most likely because that is a stupid idea and you should feel bad.

If you still aren't convinced that you'll die a horrible death if you try, here is the story of a space pirate who was probably almost as stupid as you. Unfortunately, unlike you, he didn't have any smart people like me to counteract all the stupid in the air.

So seriously, leave Celestia and Luna alone.