Dimensional Symphony

Pull together a symphony from multiple dimensions to create a 10ft radius, music will be played that will offer temporary hit points equal to that of the creature's constitution modifier. This affect will not happen if the creature already has temporary hit points. One level of exhaustion will also be removed. The music may be influenced by the environment and the plain of existence it is cast in but is not limited to it. The music played will always be positive in nature in order to calm or entertain others but can be harmful in tone should the caster wish it to be so. The music can be instrumental only or vocal but must be identifiable as music. The spell is automatically dispelled if a creature enters combat or if a creature has to do an ability check inside the radius.
((Eg. Whimsical for forest, calming for mountains, heavy for mountains))
((Its up to the DM or the player who cast the spell to decide the song))