The mysterious Rock of Dalgroth stands in the middle of the Ogre Enclave. It is named after the ogre warrior Dalgroth. Here players can mine the fourth crystal needed in the Watchtower quest. The enclave is filled with high levelled blue dragons, greater demons, and ogres, so players must be cautious while inside.
In the quest, players must bring a pickaxe and a potion used to kill the ogre shamans, in order to mine the rock. The rock can also be prospected to check for ore, however all that appears on screen is "The rock contains a crystal!" (before completing the Watchtower quest) or "The rock has a gap in which the crystal used to sit." (after the Watchtower quest). After the quest has been completed, the rock no longer serves any purpose.
Level 40 Mining is required to mine the rock, but stat-boosts like spicy stew can be used to temporarily raise the player's Mining level.