It teleports you to behind the enemy or to the side as an escape method I used special beam cannon from piccolo mentor you can just grind it out with him before hand or you can run pq18 I believe until you get crasher volcano it makes that fight easier but it is still really challenging because of whis who is just an auto gaurd monster who doesn't go away take out beerus first then whis and try to keep trunks alive so you can have him work on whis as well