Quick guide for Horror from the Deep

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Queen help book.png
This quest has an in-depth guide here.
It contains a more detailed description of dialogue, cutscenes, and storyline.

Overview[edit | edit source]

Getting started[edit | edit source]

  • Head to the lighthouse north of the Barbarian Outpost and talk to Larrissa. (Chat 1113)

Preparations[edit | edit source]

  • Go south to the Barbarian Outpost, pick up two planks north of the Agility course, and then enter through the gate.
  • Talk to Gunnjorn. (Chat 1) (Make sure to have 1 free inventory slot)
  • 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 on the 1st floor[UK]2nd floor[US] of the lighthouse (Chat 4).
  • Read the manual and ancient diary.
  • Go to the 2nd floor[UK]3rd floor[US] and use molten glass, swamp tar, then a tinderbox on the lighting mechanism.
  • Return to Larrissa (now inside the lighthouse, ground floor[UK]1st floor[US]).

The battle[edit | edit source]

  • 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 (Air 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 (at least adamant or rune crossbow recommended)

The God Books[edit | edit source]

  • Go to the 1st floor[UK]2nd floor[US] of the lighthouse.
  • Show the rusty casket to Jossik.
    • If you had a full inventory when defeating the Dagannoth mother, you will not receive a rusty casket. Instead, you must talk to Jossik, who will have picked it up for you.
  • You may now choose a book affiliated with three gods: Saradomin's Book of Wisdom, Guthix's Book of Balance or Zamorak's Book of Chaos.
    • Be sure to choose the same book twice in a row when he asks if you are sure about your selection.
  • Quest complete!

Rewards[edit | edit source]

Horror from the Deep reward.png
  • 2 quest points
  • 4,662 Magic experience
  • 4,662 Strength experience
  • 4,662 Ranged experience
  • A damaged 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 (Ironman accounts will not receive these)
Music unlocked

Required for completing[edit | edit source]

Horror from the Deep is directly required for the following quests/miniquests: