As quasi-mythical beasts that have touched upon the rules, with the blessing of the rules, they can instantly unleash a destructive power that is more than ten times that of late stage Level 9.
However, the activation of the rule power consumes a great deal of the giant beasts' innate talents, and they will quickly become weak after a short period of time, so they will not use it easily under normal conditions.
Just like the dual talent power fusion of the Thunderflame Emperor Dragon, there's some limitation to the 'quantity'.
But because their bodies have been tempered for a long time by the power of the rules, their bodies are stronger than those of late-stage Level 9 giant beasts.
Once their bodies are entirely recast by the power of the rules, with the help of the power of the origin—the power of ancient breath—they can step into the realm of mythical beasts in one stride.