Nine Nails Sealing the Abyss

Three thousand years ago, the Commander of the Abyss Suppression Office sealed the Abyss with his own body, only to be crippled by his own people. Reborn as a menial disciple of a sect, he still had nine Origin-Locking Spikes driven into his spine. Pulling out each one unlocked another level of his Dao foundation; every time he used his true Dao, the spikes sank deeper.