Tritus was fine, but that was not the case with the sea serpents coiled around his body. They roared and pain as the lightning discharge spread over their bodies at an alarming speed. Since they were still connected to the crystal staff, and Osric was still holding the latter, the lightning also came toward him.
Reason told Osric not to let go of his staff because Tritus was likely aiming for that to happen. But instinctively, his body knew that he would not be able to endure the Lightning attack because it was Water magic's weakness. He could not even use his ability to turn into water and escape because he had a feeling that once he do the lightning would strike again.
Osric's worries were on point.
The Lightning strikes had been prepared by Tritus and there were several similar scrolls that were waiting to be activated all over the place.
