Wikia

The Agitated Tunneler is a type of gyreworm summoned at Lorthuna's Gate^{[59.6, 41.2]} in Deepholm during the quest Unsolid Ground.

Notes

Though this mob is intended to destroy the Twilight's Hammer cult members in the vicinity, it will not hesitate to attack players if aggroed.
When summoning the Tunneler, pet classes should put their companions on Passive, otherwise they will automatically attack.
This mob drops no loot and cannot be skinned. It also tends to chase players a very long distance.