GILDED OST - Bosses file

You live in a desert in the 27th Century, and the world's land is about 85% desert. You find a ruin, and explore it. You see some wall-paintings depicting five people, each with an instrument pointing at the moon. The following painting depicts what looks like UFO's flying from the moon to the Earth. You figure that this band of musicians caused the invasion of the Earth in the 22nd Century.