This is a named mob in the Plane of War. For an overview of all nameds in the Plane of War, their PHs, map points, and mapped locations, see this quest entry.
Spawns health-based kobold adds (cast cleric spells including buffs that boost Max HP) that may be very resistant to melee damage and entirely resistant to spell damage (not known if controllable, or if their mitigation can be removed).
Note: If you kill the "Inasch" mobs in the room while the named is idle, they instantly respawn. However, if you kill them while the named is engage, they remain dead until the named dies (or is left idle).