I Am the Inner Demon, and the Protagonist Wants to Kill Me?

Su Lin traveled to all the worlds, bound to the "Inner Demon Comparison" system, and became the "inner demon" on the growth path of the children of destiny in the world. The stronger the protagonist is, the stronger I, the inner demon, am, and as long as I win every battle and don't get killed by the protagonist, I can continue to get stronger. As the saying goes, "cultivating immortals, slaying the inner demons, and perfecting myself", and I, Su Lin, am the inner demon that they can never slay! Huang: "I feel as if I have been living in his shadow my whole life!" Xiao: "Why is it that my inner demon is stronger than me, my Taoist heart is stronger than mine, and I can even rub the fire lotus faster than me! Who is the inner demon?" Hongjun: "Behead three corpses and then join the Tao, right?! Why can't I kill one corpse!" ..... One day, the heavens and the worlds merged, and the sons of the major planes emerged from the sky to compete for the final Dao Fruit. When they looked up, they found that Su Lin had already stood on the Dao Fruit and achieved the supreme Dao status! At that moment, the children of the plane suddenly realized that they had never gotten out of the shadow of being dominated by Su Lin in their entire lives!