The Immortal Jellyfish had been slowly changing Theron's body from the very start. Now, his body was over 80% water, and he could even freely apply the effects of his Blue Pufferfish Echo right to it.
If he was correct, and this silvery-blue inner armor was an Echo manifested to a level he had simply never seen, then it was also looking for a host to be the extension of—it wanted to be a part of someone's body, and it was more than capable of doing exactly that.
In that case, why couldn't Theron give precedent to his Immortal Jellyfish, the core and root of his body, to take control of it?
Since this inner armor was able to adapt to any worthy host, then it was about time it became the tool of a Water Mancer in earnest.
When Theron's Immortal Jellyfish set its hooks into the inner armor, it lost all ability to resist.
