The End Is Coming, I Have a Prophecy Book

Traveling through a different world, Levi accidentally obtained a prophecy book. The prophecy told him that the end of the world would come in 15 days, and magical zombies would be rampant. Fortunately, Levi can acquire various abilities by experiencing the lives of heroes. Experience the life experience of the Son. Experience the life experience of Dharma God. Experience the life experience of a thief... Fifteen days later, the end came. The survivors were all dumbfounded. Why is this Levi so strong?