In theory, the solution to the problem was simple. Use magic to scoop up a portion of the ocean floor and move the contents on top away from the barrier.
The problem was that the barrier was damaged, and the null stone was saturated with curse energy, so Wolfe couldn't be certain that it was even stable anymore.
The first scoop went smoothly enough, and Wolfe was careful to keep his magic away from the piles of Null stone as he relocated it out into what looked like it might have been a park at one point in the past.
The plant life was all changed, but there were still the remnants of a metal frame that looked like a children's play set.
"So, we move it away from the barrier and that removes its power source?" The Selkie asked hopefully as Wolfe continued to work, swimming around the perimeter of the house as he dug a massive moat to remove the saturated null stone.