Queen help book
This is the quick guide for Horror from the Deep.
For a more in-depth version, click here.


Start pointQuest map icon
Horror from the Deep icon
Speak with Larrissa, who is outside the Lighthouse, north of Barbarian Outpost.
Member requirementP2P icon Members only
Official difficultyExperienced Experienced
Official lengthMedium
RequirementsSkill requirements are not boostable unless marked with a [B] for boostable.
Quest Quests:


  • 43 Prayer Prayer
  • Ability to defeat a level 100 and level 84 monster, the second one being tricky.
Items requiredItems from the tool belt are not listed unless they do not work or are not automatically added.

For fixing the bridge:

For fixing the lighthouse mechanism:

For activating the wall:

  • A melee weapon (Ideally a slash weapon), a ranged weapon (ideally thrown weapons), and runes for all four elemental spells to switch amongst in combat
  • Games Necklace and quick teleport tabs are very helpful to reach the Lighthouse during the quest.
  • Houses by Rellekka are also helpful transportation methods.
  • Lighthouse Teleport for quick teleportation to Larrissa
Enemies to defeat

Getting started

  • Head to the Lighthouse North of the Barbarian Outpost and talk to Larrissa. (Chat 113)


  • Go south to the Barbarian Outpost and enter the agility course.
  • Talk to Gunnjorn. (Chat 1)
  • Far east of Larissa, go to a broken bridge, just past the crystal tree.
  • Fix the bridge from both sides (requires crossing it).
  • Talk to Larrissa.
  • Search the northern bookcase twice on the 1st2nd floor[UK] of the lighthouse (Chat 1), search again (Chat 2)
  • Read the Manual and Ancient diary.
  • Go to the 2nd3rd floor[UK] and use molten glass, swamp tar, then a tinderbox on the lighting mechanism.
  • Return to Larrissa (now inside the lighthouse, ground1st floor[UK]).

The battle

  • Go to the lighthouse basement.
  • To open the strange wall, use a fire rune, air rune, water rune, earth rune, a sword, and an arrow on it.
  • Open the eastern strange wall.
  • Go down the ladder and talk to Jossik, kill the Dagannoth, talk to him again and then kill the Dagannoth mother when it appears.
    • Strategies can be found here.
    • The following table shows her weaknesses in different forms:
Colour Attack Weakness
White Air spells (Wind Strike, Bolt, Blast, Wave, and Surge)
Blue Water spells (Water Strike, Bolt, Blast, Wave, and Surge)
Brown Earth spells (Earth Strike, Bolt, Blast, Wave, and Surge)
Red Fire spells (Fire Strike, Bolt, Blast, Wave, and Surge)
Orange Melee attacks (at least Rune weapons are recommended)
Green Ranged attacks or Special attacks (Adamant or Rune crossbow recommended)
  • Quest complete!


Horror from the Deep reward
  • 2 quest points
  • 4,662 Magic experience
  • 4,662 Strength experience
  • 4,662 Ranged experience
  • A god book of your choice
  • Dagannoth Mother is unlocked in Dominion Tower.
  • Access to the lighthouse general store and the dagannoth caves underneath (There are level 77 and 78 dagannoths. The level 77's use an inaccurate ranged attack, while the level 78's use a much more effective melee attack)
  • The ability to request Dagannoths as a slayer task if the Mask of the Dagannoth is owned
  • 2 Treasure Hunter keys and 2 Hearts of Ice
Music unlocked
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