All things in life were given intelligence. After countless years of accumulation, they would form demon spirits.
Demon spirit-type soul pets were not super effective on any attribute, nor were they weak to them.
That was unless there was a special life form that countered it.
For example, a sickle demon spirit would be very effective against plants.
Demon spirits were usually soul pets formed by inanimate objects with intelligence.
There were also professors who studied demon spirit soul pets. They felt that the formation of a demon spirit had a similarity to the martial soul born by humans…
Demon spirit-type soul pets' research was very special.
"In the case of those wings, if it were any other first-year student, they might not be able to recognize what soul pet it is."
"Soul pet combination of devil and demon spirit. This combination is truly wonderful."
The Stone Devil King could not fly.