Dalaran Arcandome

Purpose
As part of a series of security upgrades for the City of Dalaran, there has been put in place a heavy modulated temporal dissonance field around the City, except in and around the Violet Gate. This temporal dissonance field, also known as the “Arcandome,” will prevent teleportation into and out of Dalaran except through the Violet Gate. If the caster attempts to teleport into the City except through the Violet Gate, they will find themselves redirected to the Violet Gate, and any attempts to teleport out by the caster circumventing the Gate will find that their teleportation attempt categorically fails. In addition, with assistance from the Nightfallen, the Arcandome also protects against teleportation using telemancy, ensuring that space-time rifts are also blocked except to/from Violet Gate.

Note: that as a hidden redundancy to the Arcandome, any forced attempts to override the dissonance field will trigger a failsafe, and the caster will find that their teleportation spell is automatically redirected to a Level 2 holding cell within the Violet Hold for breach of the Teleportation & Portals Act, pending trial.

Powered by several independent Saraphix Aurum Generators hidden in classified locations throughout the City, the Arcandome will thus be unaffected by attacks on the city itself, which include any forced siphoning of magical energy from the City proper.

Those within the Cabinet are given the frequency of the Arcandome via their holobracers to allow for teleportation in and out of the city. In addition, Interior-approved telemancy beacons also allow for teleportation into the city as necessary.

Background
The Dalaran Arcandome was conceived out of a need to protect the City from unauthorized entry/exit, specifically to evade justice or commit another crime. Partially inspired by Jaina Proudmoore's warding of Darnassus prior to the Divine Bell incident, and more directly through the escape of a suspect from an arrest attempt, the Arcandome is designed to secure the city from similar setbacks again.