Start Accumulating Merit by Falling in Love with a Demonic Saint

Li Tian died, but was told that because of insufficient merit, he could only be reborn as a snail in his next life. Be a snail? What a joke! Whoever likes it should be treated as such! But there is another way, which is to take a gamble and travel to another world to complete tasks and accumulate merit. Of course, if it succeeds, it will be a great merit. But if you fail, your soul will be gone and you will never be reincarnated! But why are these missions so strange?