Immortality: Staying in the Demon Suppressing Tower, You Will Be Invincible After Birth

Travel through the alien world at the end of the human race and become a glorious demon-suppressing tower corpse-moving operation. No system, no hope, just endless life. Tang Xuan only had one idea, and that was to survive. Everything depends on everything. I don't know if you will die. I won't die anyway. The 90% chance is still too low! Only 100% is stable!