Universal Mirror

The Universal Mirror (also known as the Mirror To The Universes) is a magic mirror that appears in the Crossovers Arc of the Smurfs: The Magical Blue story series. As it's name implies, it allows the user to travel to one universe to another without any risks to their own. The mirror can also sent signals for help to another universal mirror, all the user has to do is to wave the hand on the mirror, and the other one gets a flash of light for help.