The Immortal's System.

Vlad, the only immortal to survive an end of the Era tribulation, is bored. So bored that he decides to kill himself and start a new life after going through the cycle of reincarnation. Before he kills himself, he creates a golden finger for his reincarnated self in the form of a system fused with his soul. But due to the fusion, his soul takes too long to reincarnate and the system also gets damaged, resulting in much of its database to be sealed because it couldn't be destroyed in the cycle of reincarnation. He is reborn in an unknown world and at the age of three, when the system activates, starts regaining bits and pieces of his memory.