Now that Artemis was evolving, he couldn't use her to occupy his mana core anymore.
Thus, she was unable to fuse with him.
That was sad as it restricted his ability to fly too, but in the worst-case scenario, Jason could make use of Solaris, who was able to replicate Artemis' wings.
Because of that, there shouldn't be any big problems for him.
Instead of focusing on these issues, Jason would rather do something that would help him to become much stronger.
Even if he didn't know about the events that were bound to occur, he knew that something bad was going on in the Julandra region.
Awaiting the attempt to be assassinated, Jason would stay inside the City Lord's manor for the time being.