Demons

As far as Wu Yu knew, demons were aggressive by nature, and the mortal enemies of martial cultivators. All demons held hatred for martial cultivators. If not for martial cultivators, they could roam freely through the mortal world.

Beasts turning into demons was the preliminary transformation, when they gained sentience and became demons. As for shapeshifting, this was a more uncertain business. Some could shapeshift the moment they gained sentience, while others could not, even after centuries. It had to do with the demon types. It was said that the weaker the bloodline of the beast, the easier it was to shapeshift. Some could shapeshift even before they possessed demon essence, while others could only do so after.

Typically, demons needed a century of cultivation to gain their demon essence, fashioning a demon essence core similar to a spiritual source. Of course, some demons with a powerful bloodline could obtain their demon essence in merely a few decades. The strength of a demon was therefore generally measured in terms of years.

Demons of more than a century old were considered adult demons. These demons absorbed day and night, and the spiritual qi in the environment. Every 100 years, they could form a demon essence core. After 1,000 years, they would have 10 demon essence cores and be considered 1,000-year old demons. If they could form a yaodan, which was even more terrifying. They could then compete with Jindan Immortals.

Forget 1,000-year old demons, even 100-year adult demons were difficult enough to deal with. Of course, 100-year adult demons and 1,000-year old demons were just labels for demon strength, rather than explicit description of their age. Some demons were not even considered 100-Year adult demons after a millennium, unable to produce even demon essence. Other demons could do so in a matter of a decade. In order to create a yaodan, a thousand years might not be enough. One needed luck as well.

Demons, compared to martial cultivators, were of inferior talent, but they had the edge with their longevity. As long as they were not killed, they all had a few hundred years of life.