Serenity – Killy Roblox Id 3936738145 Vote Up +1 Vote Down -0You already voted! This is the music code for Serenity by Killy and the song id is as mentioned above. Please give it a thumbs up if it worked for you and a thumbs down if its not working so that we can see if they have taken it down due to copyright issues. Tags: Serenity - Killy Roblox Id