Over the next few days, ARC began working its way through every textbook Harry owned—recording, indexing, analyzing. Every spell he had ever cast, every wand movement he had ever attempted—ARC reviewed it, slow-motion, frame by frame.
"Your Expelliarmus is 17% inefficient. Adjust wrist flick angle by 2.4 degrees. Again."
Harry practiced in his room silently, wand flicking precisely under ARC's guidance. For the first time in his life, magic made sense. Patterns emerged. Runes connected. Spells that once seemed impossible to master—like non-verbal incantations—began to flow with ease.
"Would you like to attempt experimental spell synthesis, Harry?"
"You mean—make my own spell?"
"Correct. We have enough data. I suggest starting with a hybrid of Protego and Petrificus Totalus."
By the end of the week, Harry had a spell that could both shield and stun—instantly.
He named it "Stasis Ward."