Eluvian

An Eluvian (Elvish for "seeing glass") is a magical mirror featured in the Dalish Elf Origin, the Witch Hunt DLC and Dragon Age II. It is known to be a portal of some sort, and it can transmit the Blight disease. It was crafted by the elves of Arlathan to be used as portals for telecommunication and perhaps even teleportation between their cities, using a type of magic different from that of the modern Circle of Magi or even the Tevinter Imperium. After the fall of Arlathan, the Tevinter magisters attempted to unlock the secrets of the Eluvians, but all they could use them for was long-distance communication.