It's an action fantasy manwha, where the MC eats and gain the abilities of those who he had defeated and at start he is a hunter(???) And even in the earth he has able to use the abilities of animals he ate then he got transported to another world one day, he is a black haired Mc and he has a prince who can (allegedly) send him back home, he can morph into a dragon.
I think it was this https://www.mangago.me/read-manga/i_grow_stronger_by_eating/
I will have to bear this heart ache