Hit Me and I Ascend

Transported to a world of immortal cultivators with only three days left to live, an ordinary man awakens a bizarre system: every attack restores his life and makes him stronger. While others spend decades training, he advances by inviting the deadliest fighters to beat him senseless. He survives a brutal trial, auctions off the chance to strike him, subdues legendary spirit masters, and humiliates the most powerful sects. The harder his enemies attack, the closer he gets to immortality. But when a demonic army descends and the greatest cultivators turn against him, his seemingly endless health bar faces its first true test. They think they are killing a helpless nobody. In reality, every blow is helping him ascend.