The Fierce Lord

【Lord-building, with a modest golden finger】 All of humanity transmigrates to a game world. Everyone has only one life: after death, they return to reality. No matter how long they spend in the game world, only an instant passes in reality. Most importantly, every level gained in the game world adds one year to your lifespan after you return. Reach level 20, and all illnesses and ailments disappear. Reach level 50, and you become young again!