I created the devil and became the most powerful villain

[Behind the Scenes + No System + No Heroine + No Virgin]
Nie Wudao obtains the Demon Cauldron and refines the Demon Pill.
Apart from himself, any creature that eats the Demon Pill will become a demon and gain special abilities.
Want to gain power? Then become a demon!
Demon Apocalypse:
Sequence 1: Undead Demon
Sequence 2: Flame Blade Demon
Sequence 3: Sword Hidden Demon
Sequence 4: Spike Demon
......