The Final Battle with the Thunder Spirit

Zeus clenched his teeth, every muscle in his body straining as he continued to draw the immense power from the massive Thunder Mana Stone. The process was excruciating, the wild, untamed thunder mana rampaging through his veins like a violent storm.

It tore at his insides, threatening to break him apart with its sheer ferocity. But Zeus, a man who had faced countless trials, refused to yield. The pain was unbearable, but his determination to harness every bit of the thunder mana outweighed his agony.

As the mana surged through him, he could feel the presence of the Thunder Spirit, the entity that had long resided within the stone, growing desperate.

Sensing the threat to its very existence, the spirit abandoned its control over the thunder zombies. Instead, it focused all its efforts on making the mana even more chaotic, more uncontrollable, in a last-ditch attempt to shatter Zeus's resolve.