Doomsday: Start with a Mental Hospital

[Rebirth for revenge + stocking up on supplies + infrastructure] In his previous life, he was betrayed by his friend and his body was cut into pieces and presented to the zombie king. After being reborn, he counterattacked and became the protagonist, hoarding trillions of supplies as the leader, and transforming mental patients as teammates. In the last days when supplies were scarce and mutants were swarming, he fought against natural disasters to build infrastructure, grow food, and build a mental hospital into an invincible safe house. As long as he has everything he wants in his pocket, including future predictions, mind control, and divine medical systems, even the zombie king will bow to him!