His bones, muscles, organs, blood, marrow, and even skin were all being cleansed and strengthened by ritualistic magic. Even his connection to the dragons was somehow amplified. The process of body reforging was demanding, but when it was finished, there was still leftover wild magic in the air. He decided to channel it inside himself to improve magic reserves. Jon Snow was by no means a squib, but his magic was very undeveloped from lack of use.