The Earth Guardian's strength was immense, and Jacob continued to endure as he studied its fighting style and how it used its aura. He had never fought someone with this kind of control over its aura at such a high level.
Furthermore, the Earth Guardian never showed any sign of Soul Force, which made things much easier for Jacob because no matter what trick the Earth Guardian tried, it couldn't scratch his skeleton.
All Jacob needed to avoid was the battle axes attacks, and they endured some pain. As the battle dragged longer and longer, the Earth Guardian seemed to have endless aura and stamina.
However, the Earth Guardian's opponent was also a monster with endless endurance. As long as Jacob wasn't forced to use his Soul Force, his physical stamina seemed to be limitless—all because of the cursed blood!