The next time Arthur stepped out of Barda's training pocket universe, 66 days had passed outside, which translated to 198 days within.
Long story short, Arthur was now 79 years old and roughly 4 months along the path to 80, since, as usual, his age wasn't measured by calendars but by the time he'd personally lived through.
Anyway, the reason Arthur had ended his Law Comprehension Session early and left the pocket universe was that Barda had sent Rishia to call him out.
That naturally led to the question of why Barda would do such a thing, and when Arthur asked Rishia, she told him it was because Barda claimed he'd finally completed his "masterpiece" and wanted Arthur to come see it.
