When he wakes up, you don't actually bother to tell him what you did. He can just go on with his normal spine-melting magic practice for now, though not before you inform him of the first three steps you need to be able to 'Trace' objects. He can figure out the rest for himself. Now that he won't have terribly atrophied circuits thanks to you activating his natural circuits earlier in his life for him, it's possible that this Shirou will end up even more powerful than any of the others!

Part 3