Light's Judgment (item)



Light's Judgment was the main cannon of the Army of the Light's dimensional ship, the Xenedar. After the ship was shot down by the Burning Legion on Argus, the cannon was located on the planet surface. After Grand Artificer Romuul calibrated the teleportation matrices, the weapon's recall mechanism security feature was triggered and automatically teleported and deployed on the hull of the Vindicaar, the closest dimensional ship, and which the Lightforged have since made their new vessel and base of operations, even after the Argus Campaign.

One of the racial abilities of the Lightforged draenei, an allied race for the Alliance, is to call down Light's Judgment (racial), and has the exact same visual effect, although it inflicts considerably less damage and does not stun opponents.

Source
This item is obtained when choosing the Vindicaar's Champion power, "Vindicaar's Gun", as your power on Argus.