William's body slowly reformed from the puddle of blood, and the, hopefully permanently, docile Elements returned to their previous state. The only problem was William still felt that he couldn't use his Magic for at least a few hours.
That aside, the Chaos Element had successfully upgraded to S-Rank, and William chose not to blame it for how it acted during the upgrade. Even if he was angry, there was nothing William could do to an Element within his own body.
Elements had their own nature, after all. William couldn't change that, no matter how hard he tried. He would just have to be more careful in the future.
Next time, the Chaos Element goes first.