Looking Glasses

The Looking Glass is a magical transport device. As of yet it was seen only as a portal to Wonderland. ("We Are Both")

History
In a desperate attempt to be rid of her mother and escape her unwanted marriage to King Leopold,  Regina uses Cora's spellbook 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 underestematesher daughter. With encouragement from Rumplestiltskin appearing 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 one use only.
 * The door to Wonderland in the Portal of Doors is also mirror-like.