I Evolved After Devouring The Demon God is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

He accidentally entered the forbidden area and gained the ability to “devour the wasteland”! How will he who would become a “monster” fulfill his childhood sweetheart’s last wish? With the “curse” of the devil, the bloody adventure of the mysterious continent begins…