Horror from the Deep Quest Guide
OSRS Horror from the Deep walkthrough, requirements and rewards
Updated September 2026
Horror from the Deep unlocks the Lighthouse and its Dagannoth caves, rewarding a damaged god book of your choice. It needs 35 Agility and completion of Alfred Grimhand's Barcrawl.
On this page
6 sections
Overview
| Difficulty | Intermediate |
| Length | Short |
| Quest points | 2 |
| Series | None |
| Start point | Talk to Larrissa outside the Lighthouse north of Barbarian Outpost. |
Requirements
Skill Requirements
| Skill | Level |
|---|---|
| Agility | 35 |
Other Requirements
- Completion of the Alfred Grimhand's Barcrawl miniquest
- Ability to defeat the Dagannoth Mother, who cycles damage types
Items Needed
- Fire, air, water and earth runes
- Any sword or longsword you are willing to lose
- Any arrow (not ogre or training arrows)
- Molten glass
- Tinderbox
- Hammer
- 60 steel nails
- 2 regular planks
- Swamp tar
Recommended
- 40 Prayer for Protect from Missiles
- Combat level 50 with armour and food
- 13 Magic+ to cast each elemental spell
- Fast travel to the Lighthouse and Barbarian Outpost
Walkthrough
Video walkthrough by Slayermusiq1.
Rewards
- 2 Quest points
- 4,662.5 Magic, Strength and Ranged experience
- A damaged god book of your choice, upgradable to a Holy book, Unholy book or Book of Balance
- Access to the Lighthouse general store and the Dagannoth caves
- Dagannoth Mother accessible in the Nightmare Zone
Related Quests
Related Tools
Horror from the Deep FAQ
01What are the requirements for Horror from the Deep?
35 Agility (boostable) and completion of Alfred Grimhand's Barcrawl, plus the ability to defeat the Dagannoth Mother.
02How do I damage the Dagannoth Mother?
She cycles every 18 seconds between being vulnerable to one damage type. Watch her colour and use the matching elemental spell, Ranged or Melee.
03Which god book should I choose?
You can choose the Holy book (Saradomin), Unholy book (Zamorak) or Book of Balance (Guthix). The others can be bought from Jossik for 5,000 coins each.
04How long does Horror from the Deep take?
It is an Intermediate, Short quest, though completing Alfred Grimhand's Barcrawl to start it can take a while.
05Is Horror from the Deep worth doing?
It unlocks the Lighthouse and Dagannoth caves, gives 4,662.5 experience in Magic, Strength and Ranged, and is required for the Culinaromancer section of Recipe for Disaster and the Medium Fremennik Diary.
06Can I safespot the Dagannoth Mother?
The Dagannoth and Dagannoth Mother can be safespotted, and with Protect from Missiles you can negate all of the Mother's damage while switching attack types.
07Can I boost Agility for Horror from the Deep?
Yes, 35 Agility is boostable, but completing Alfred Grimhand's Barcrawl is required to start the quest.
Next Quest
See every quest in the game, or find the next one on the optimal route.
Sources & methodology
XP rates, requirements, and drop data in this guide are cross-checked against the OSRS Wiki and verified against in-game behaviour. Grand Exchange prices move daily, so treat GP/hr figures as estimates and confirm current prices with the OSRS Wiki price tracker before committing to a method.
Darren started playing the original RuneScape 2 back in the day and came back when Old School RuneScape launched. He's played on and off over the years and built OSRSToolkit to give players a single place to find reliable tools, calculators, and guides — all informed by real in-game experience.