National Contract: I Contract with Bai Mao with Zero Synchronization Rate

[National Contract + White Hair and Red Eyes + Big Demon King] In the era of national contracts, everyone contracts with mythical beasts and fairies. With a shake of his hand, Cheng Ye signed a contract with the most useless spirit in the room, and was ridiculed for three days. Until the day he was about to die, a world-destroying demon king exploded out of the dead spirit. Demon King: "I don't want to protect you, but it will be very troublesome if the contractor dies!"