For the Evil Clan, there are three most common ways to break through to the Evil King realm. The first is to devour heavenly treasures; the second is to swallow the essence of the sun and the moon; and the third is to devour other powerful Evil Beasts.
The first and third ways are the most common, while the second takes too long and is only adopted by some long-lived monsters.
As for the third way, devouring other Evil Beasts, naturally it is effective to devour higher-level monsters than oneself. For the surrounding powerful monsters, the blood of the Evil King is naturally the best catalyst for evolution.
But after advancing to Evil King, the power of bloodline becomes fixed. It is difficult to produce results by devouring higher-level monsters, and there are various drawbacks.
Also, Evil Kings already begin to operate like human cultivators, starting to cultivate secret techniques, and awaken the supernatural powers hidden deep in the bloodline.