Monster Eater is a Manga/Manhwa/Manhua in (English/Raw) language, Action 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

“I’ll get stronger, by eating monsters!” Rude is an E-rank adventurer who possesses only a single skill: Debuff Immunity. Sadly, gathering herbs in miasma-filled dungeons is about the only thing his questionable skill is good for. Being of practically no use in combat, his fellow adventurers ridicule him, calling him a “miasma scavenger.” Rude decides to challenge a new dungeon, determined to clear his nameーuntil disaster strikes, and he’s betrayed by his comrades. Out of items and on the verge of death, he resorts to committing the taboo act of eating monster meat, but…? Thus begins Rude’s adventure of simply eating monsters to gain new skills!