I Have a God-Tier Sign-In System and Am Invincible in Another World

After Guo Yan dies unexpectedly, he transmigrates to Canglan Star. Following a world war, the planet is severely irradiated, causing its creatures to mutate. The marine life is especially powerful and launches fierce attacks on humanity, which now faces the threat of extinction. At this crucial moment, the Will of Heaven appears and launches a survival event in another world. Humans can take part in the event to earn rewards and grow stronger, giving them a chance to avert extinction...