Undead Bloodline
"Child, don't be mad. I'll show you the power of an immortal." An old man transformed his energy into a long sword; the power of the sword was so sharp that it was actually severing the space itself. Fei knew this was not going to be easy.
Of course, this doesn't mean he is going to lose. His physical strength was enough to compete with them, especially using purple energy, and his true energy has been transformed by purple energy too. He can directly use this newly transformed energy to compete against the immortal energy.
Of course, this energy was mainly transformed from God Force; to be exact the god force was the energy that merged with purple energy to get a powerful form of God Force. After awakening the fourth seal permanently, his body was flooding with Immortal Energy.