Listen to Goblin Slayer Opening Full: Rightfully online. Goblin Slayer Opening Full: Rightfully is an English language song and is sung by Rap AR Anime. Goblin Slayer Opening Full: Rightfully, from the album Anime Opening, Vol. 2, was released in the year 2020. The duration of the song is 1:30. Download English songs online from JioSaavn.