Balwûr

Balwûr is a Hive Wizard that is one of three possible weekly encounters summoned from an Antiquated Rune.

Tactics
Balwûr's presence alone keeps the mist on the Court of Oryx in most places, except under the platform at the Court of Oryx, where a safe zone is present. She spawns Acolytes of Balwûr around the Court, which cannot be killed unless a Guardian is in a safe zone. On killing it, a temporary safe zone is created outside the underside of the platform. While Guardians are in that temporary safe zone, they can deal damage to Balwûr.