Looking Glasses

The Looking Glass is a magical transport device. It first appears in the second episode of the second season.

History
In a desperate attempt to be rid of her mother and escape her unwanted marriage to King Leopold, Regina uses Cora's spell book to summon Rumpelstiltskin. He gives her the Looking Glass, instructing her to push Cora in if she never wants to see her again. On the day of her wedding, Cora visits Regina and immediately recognizes the Looking Glass. She tells Regina that she is not so easily disposed of and suspends her in magic; however Cora underestimates her daughter. With encouragement from Rumplestiltskin in the Looking Glass, Regina breaks free from Cora's spell and pushes her into the portal. Cora lingers for a moment, then vanishes and the Looking Glass shatters. ("We Are Both")

Trivia

 * It can be assumed that all Looking Glasses are available for one use only.
 * The looking glass is inspired by the sequel to Alice in Wonderland called Through the Looking-Glass, and What Alice Found There.