Amberser's goal was to create an Undead body that wouldn't be countered by Holy Light, and Big Black and Husky were his test subjects.
Of course, you can't conduct experiments on yourself.
From the movies I watched in my previous life, every doctor or scientist who used themselves as test subjects met a bad end; either they went mad or turned into idiots. People who were once intelligent all transformed into muscleheads after their experiments.
At the time, Amberser lamented, "So when you say your darkness increased tenfold, you mean your muscles did?"
Once you toss away intelligence, no matter how many times stronger your muscles become, the outcome is always bleak.
So, taking in these "predecessors'" lessons, Amberser decided not to use himself as a guinea pig until the experiments yielded results.
