Listen to Hammer Of Justice Theme -Secret Boss - Chapter 4 (From 'Deltarune') (Epic Metal Version) online. Hammer Of Justice Theme -Secret Boss - Chapter 4 (From 'Deltarune') (Epic Metal Version) is an Instrumental language song and is sung by D.Meletis. Hammer Of Justice Theme -Secret Boss - Chapter 4 (From 'Deltarune') (Epic Metal Version), from the album Hammer Of Justice Theme -Secret Boss - Chapter 4 (From 'Deltarune') (Epic Version), was released in the year 2025. The duration of the song is 2:21. Download Instrumental songs online from JioSaavn.