Xiang Yu stared at the system notification with widened eyes. This was only the second time the system had actively appeared before him without being summoned. The last occurrence had blessed him with the OP Fusion function. Now, another opportunity presented itself.
Two choices, each promising different rewards. The first option, "Upgrade an existing system function," immediately captured his attention. After all, the daily experience doubling wasn't the system's core purpose but merely one of its functions. What might happen if he upgraded it? Would his experience points triple daily? Quadruple? The possibilities made his heart race with anticipation.
Eagerly, he selected the upgrade option, only for his excitement to crash against harsh reality:
[Upgrade System Function]
[Double Exp: (0/100000000000...)]
[Fusion: (0/1)]
