Horror From the Deep

By: Salmoneus
Special Thanks to: Crazykid1964, Cxkslei, Damaged500, dawesbr, DXleader93, Gravedigg154, JJohnston, Mickyicky3, Mouse, Mrcsupertrain, Ms Lestrange, Neo Avatars, Shooter585, Sobend, £nemy

Essential Info

Start Point

Begin by talking to Larrissa near the Lighthouse north of the Barbarian Outpost.


  • Skills: None.
  • Quests: None.
  • Items: Food, Melee Armour, 5-8x Prayer Potion, Ranging equipment, Runes for Magic attack spells


  • Difficulty: Experienced
  • Length: Short

Getting Started

First off, head to the lighthouse located northwest of the Barbarian Outpost by jumping across the Basalt Rocks on the coast until you reach a cliff-like island. Head north to the Lighthouse and talk to Larissa who asks for your help. Ask her what you can help her with, and she explains about her boyfriend being missing, and she'll tell you to visit her cousin to see if he can help.


Fixing the Lighthouse

Lighthouse KeyNow head back to the Barbarian Outpost and go in through the gate. Now climb through the Pipe to the south and talk to Gunnjorn the Barbarian near the house to the southwest. He should give you a Lighthouse Key, which will allow you to get into the Lighthouse.

Now you'll need 2 Planks, 60 Steel Nails and a Hammer to fix the bridge. Planks can be found just to the north of the outpost, and Steel Nails can be either Smithed, bought from the Varrock sawmill operator, or traded. Go back to the Lighthouse and head southeast along the path until you reach a broken bridge. Use a plank with each side of the bridge to repair it, and then head back to Larissa.

The broken bridge

After speaking to her, go inside of the Lighthouse and head up the staircase. Search the bookcase, take all 3 books and read through them. Go up the stairs and use some Swamp Tar with the Lighting Mechanism. Use a Tinderbox with the mechanism to light it, and then use some Molten Glass with it to fix the light.

The Dagannoth

Climb down the ladder to the main floor, and then climb down the Iron Ladder to find a basement. On the north wall should be a Strange Wall, which you need to use 1 of each Elemental Rune, as well as any type of Arrow and Sword with it to open. Remember, you won't get any of these items back later.

Strange Wall

Now open the Strange Wall and climb down the Iron Ladder to find a cavern, as well as Jossik who seems to be injured. Talk to him, and he says that a monster attacked him. You'll then be attacked by a level 100 Dagannoth, and after killing it speak to Jossik again and you'll be attacked by another, meaner, level 120 Dagannoth Mother.

The Dagannoth Mother

The Dagannoth Mother fights with a combination of melee and ranged attacks. Her ranged attack is a bit more powerful, however she will not use it after she has used her melee attack. Due to this, try attacking her up close and use the "Protect from Melee" prayer. From time to time, the Dagannoth Mother will change colors (and a message will appear in the chatbox), indicating the attack style she is weak against:

  • Orange - Melee attacks
  • Green - Ranged attacks
  • White - Air spells
  • Blue - Water spells
  • Red - Fire spells
  • Brown - Earth spells

At first the Dagannoth Mother is vulnerable to all attacks and then she will be vulnerable to water spells, so to make it easier on yourself go into the fight autocasting water spells. The Dagannoth Mother most often attacks using melee, so using your Protect From Melee prayer (if available) is useful since her melee attack seems to be the most powerful of the three. However, it's important to note that whenever you use one protect prayer, the Dagannoth Mother will switch her attack style to another type.

You cannot stand behind a stalagmite and wait for the mother to become vulnerable to a ranged or magic attack. If you do this she will not change weaknesses and eventually walk away.

Completing the Quest

Rusty CasketAfter killing the Dagganoth Mother, you'll find a Rusty Casket, and you will find yourself just outside of the Strange Wall. Your quest is complete!

Congratulations! You have survived the Horror From the Deep!


  • 2 Quest Points
  • 4,662 Magic experience 4,662 Ranged experience 4,662 Strength experience


God Books

After killing the Dagannoth Mother, you will receive a Rusty Casket. Bring this to Jossik, who is located upstairs in the library. He will ask you what it says, and you'll have the chance to choose one of the three main Gods: Saradomin, Guthix, or Zamorak. After you confirm your choice, you will receive a Damaged Book of the selected god.

Initially, the book adds +2 to your Prayer equipment bonus when wielded in place of a shield. However, adding pages will enhance the equipment bonuses the book provides, and each book provides different bonuses. In order to complete each God Book, you must add four pages which correspond to the book (for example, pages for the Unholy Book cannot be added to any other book). Once you have added all four pages to a book, the Damaged Book will become a completed version of the book, and will no longer be "damaged." The name will depend on the god the book is devoted to:

Once you have completed one book, you may speak to Jossik and purchase another Damaged God Book from him for 5,000gp. Along with the "main" God books you could initially purchase, you will also have the option of purchasing books devoted to Armadyl, Bandos, and Zaros.

If you ever lose one of your God Books, you can speak to Jossik to get it back, with any added pags intact.

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Published on: November 19, 2004 03:40 AM UTC by Salmoneus
Updated on: January 09, 2014 02:29 AM UTC by Sobend