Dance of Endless Music

You track the entity within your line of sight and begin to play an enchanting tune on your respective instrument, which causes them to begin to dance. They don't seem to be able to cease on their own accord. You control when they stop, or if they ever stop. If you cease your melody for atleast 30 seconds they are allowed to regain their own will, otherwise they are vulnerable to any and all actions against them. You your self cannot do much either to avoid action, as you must concentrate on your music. Let's see how long you both last.