Portal tilt
The eighteen mana roots were completely depleted, so there was no point in hanging around in this needle universe anymore. They could spend a bit more time here to mess with the giant fish, sure, but that was about all of the activities that they could do, there wasn’t anything else. Purpureus Mundi Aqus was otherwise really desolate, so desolate, that the team didn’t even understand how all the fish hadn't starved away already!
This sea was barely a kilometer wide, so it shouldn't be able to support such huge fish, and yet that wasn't the case, there were plenty of them in the vicinity. This was very puzzling, sure enough, but they had to leave nonetheless, because they got more out of this place than they originally wanted. They were content, so they swam upwards as if they were satisfied girlfriends, even, their stride was rather jolly!