The Legend of the So

Iron Man suddenly chuckled dryly, speaking to himself: "My father participated in the rebirth plan back then, keeping a tube of the most original super serum. I don't know what side effects it has. I've always kept it as a treasured relic from him, dear Guan..." Tony's face instantly darkened, revealing a sinister smile, "For world peace, for enhancing your abilities, I'll have to burden you a little! Thor, hold him tight! I'm going to get started!",Pointing to the massive cave before them, Daniel said, "Walk to the end of this cave, and you will face your greatest opponent in life. Defeat him, claim your inheritance, and you will have passed this trial!",Daniel shrugged and whispered, "Good luck! Guan Heng!"。