Reborn as a Clone: Whoever's Stronger Is the Real Body

[Fantasy + System + Demon King avatar + power progression] Demon: “You're nothing but an expendable avatar of mine, yet you dare look me in the eye? Get on your knees!” Su Xiao transmigrated to a world of immortal cultivation and unexpectedly became the demon's avatar. Faced with the choice between resisting and waiting to die, he chose to surpass the demon and become the true self. Three years later, the demon cowered at Su Xiao's feet and pleaded, trembling, “Bro, you're the real one! Just let me be your avatar! I'll be your dog!” Su Xiao merely gave him a disdainful smile. “I still prefer you the way you were before, defiant and untamed.”