Substitute short-term pain for long-term gain!
Carson Flores figured it out. Cillian Bernard couldn't change or resist the orders of the Sect Hierarch, but didn't want his deeply beloved cousin to suffer in the Suffering Pray Sea, so he came up with this plan.
Getting into the Suffering Pray Sea surely isn't difficult, after all, it's a place of banishment. Just make up some random reason and toss him in, right?
After a half-year or a year of banishment, he could use this time to find Lorvian Randall, and quietly bring him out when his banishment ends, reducing the time Lorvian Randall would suffer.
As the century mark approaches, find another reason to throw Lorvian Randall in under a different identity. Then he could openly leave the Suffering Pray Sea as Lorvian Randall.
"I heard about the incident with Niall Sinclair. You were able to secretly escape with Niall Sinclair right from their doorstep, proving you have the skills to hide people and make them untraceable."
