Tomb Raiding: My Family's Last Clan Chief is Little Brother

[Iron triangle + not mindless + system + main plot with plot holes and extensions + no female lead and no romantic pairing]
In the later world of Tomb Raider Chronicles, Zhang Wuxun, a descendant of the Zhang family overseas, dies unexpectedly while exploring the Zhang family's ancient building. Unexpectedly, he is bound to a system that claims to be created by the thoughts of millions of fans and is transported to the time when Tomb Raider Chronicles begins.
Zhang Wuxun's mission, besides exploring the so-called ultimate truth in his father's notes, is also to fulfill the strongest desire of the fans—to leave no regrets.
The road was fraught with traps and shrouded in mist.
What is the truth?
Bai Ci emerges from her cocoon; immortality is no longer sought.
Can he overcome the obstacles and find the meaning of his existence?
In the Iron Triangle, Muyu is family, admires and cares for Xiao Ge; he is a younger brother, his own child, and takes care of Wu Xiaoxie; and he is a close friend, a trusted partner, and a comrade-in-arms with Fatty.
Pan Zi was respected for his loyalty and strong sense of righteousness.
They were all people that Muyu wanted to bring under his wing for protection.

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