Final Option

Even Kahn was bamboozled at this point because even his unparalleled and probably one of the most sure-shot killing moves aka the Dimensional Cut that could cut anything in 3 kilometers range with a single swing at this point… failed to cut off Cthulhu's head.

"What the hell happened here? Is its unique ability that much overpowered?" asked Kahn himself in a befuddled voice. 

The system had already informed him about Cthulhu's unique ability. If even an entire arm was cut down, it could reattach and recover instantly without any ramifications. 

But the neck region was always the weakest part and an unrivaled attack skill like Dimensional Cut should've been enough to cut off Cthulhu's head. 

[Boy… your attack did cut its neck. But the cells regenerated and healed it so fast that you couldn't even see it happening.] informed Rathnaar in Kahn's mind. 

"Katon Surasshu!" 

BANG!!