Bladeclaw Beast, like any regenerative monster, was able to heal absolutely any wound, there were really no limits.
If someone ripped Adam's heart out of his chest, he would die within seconds, however, for Bladeclaw Beast, the loss of such an important organ was not a problem.
However, this did not mean that Bladeclaw Beast was invincible, no, regenerative monsters had their weaknesses. Due to their body structure, they all had feeble defenses, as one could not regenerate stone or iron armor as easily as pure flesh.
Regenerative monsters also rarely had any energy abilities. While Thunder Demon could cause destruction comparable to the most powerful explosions, Bladeclaw Beast mostly had only physical attacks in his arsenal.
Sure, there were exceptions to every rule, but a monster couldn't have great destructive power, defense, speed, and an incredible regeneration rate.