Before the Dawn of History, Human Ancestors Had Yet to Evolve

Lin Dong was sent by a blasted wormhole to a time before humans had evolved, when he was the only true human on the entire planet. Luckily, his body mutated as he transmigrated through the wormhole, granting him eternal life. Starting with making fire by drilling wood and crafting stone axes, he kept a low profile on a small hill, farming and developing his land while slowly waiting for humanity to appear.