User blog comment:The Deadliest Warrior/Harry Potter vs. Percy Jackson/@comment-422690-20100923224312/@comment-422690-20100923225443

But I think it may be easier to KO someone with a spell designed to do exactly that (Stupefy), and Petrificus can easily be combined with sword to get a KO. Add to that Expelliarmus, the disarming spell to rid Percy of his weapons, and I think you've got a winner.