Listen to the sound clip 2. Ef Boss from Revenge of the Bird King - Video Game Music: 2. Ef Boss 2. Ef Boss This sound is from Revenge of the Bird King - Video Game Music Video game music from Revenge of the Bird King for PS Vita, PS4, Switch. Published by M7 Games, Mighty Rabbit (2018). Uploaded by peterdao. Go to the full soundboardwith more sound clips Search