For this creature, he had to try a new technique. This time he had to use both the soul's and the physical experimentation with the slime so he had to be extra careful in dissecting the slime.
The slime was a different existence altogether and he knew that when he had obtained its information. Unlike most creatures where their soul and physical body were separate existences, the slime's structure was that they had entered a symbiotic relationship with each other.
It had almost fused with each other resulting in the abnormal situation of the slime. Without the soul, the body wouldn't survive while without the body, the soul wouldn't survive.
It was mutually dependant on each other so experimenting on only one of them would result in a failure.
