A Grim Disturbance

As a rare encounter in the King's Forest for the Clerics of Amaunator faction, the Drow Necromancer Guldryx Avrenyl will summon a portal through which endless spawn of enemies will come through. This stops when the necromancer is killed.

Tip: You can use this encounter to work on your wilderness slayer for the King's Forest, as well as Drow Monster Manual drow slayer deeds.