The protagonist is bound to the "Taixu Sign-in System" and can "check-in" at a specific location every day to obtain skills, spiritual weapons, elixirs or hidden plot clues. The more dangerous the sign-in location, the richer the reward. The system is bound to the "Taixu Jade Pendant" left behind by the protagonist's mother, and is suspected to be related to the ancient Taixu Immortal Lord.
