Becoming a Villain Starting as the Underground King

I Actually Became the Villain?! - Underground King

And I even have the ability to devour... Only the strong can survive. The weak will become my nourishment!

Devour and evolve!

"Devour the Deep Sea King and gain the power of the ocean!"

"Devour the Sky King, and all three types of power will be mine!"

"Ding! Want to see the protagonist take Tornado? Cough, cough. Then go do it!"

This novel and its characters are purely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate anything in this story.