Finding a Korean? shounen manhwa

Hey guys, im tryna find this Korean manhwa I binged in one night. It's giving ORV vibes, this guy was super obsessed with this monster game where you got multiple skins and could merge them to become one OP monster, he transmigrates into the game and becomes a monster and because of his knowledge becomes hella OP. Oh and he also adopted this jelly-like thing that is really cute and apparently its supposed to become this legendary monster later but rn its still smol and cute.