OSRS Dagannoth Rex Guide: Safe Spot, Gear & Drops

Overview: Dagannoth Rex at a Glance

Dagannoth Rex is a full boss in the standalone boss group, rated 3 out of 5 in our boss index and normally fought solo.

Before you can fight Dagannoth Rex you need Horror from the Deep.

Rex safe spot is what this fight actually asks of you, and it is the thing standing between you and berserker ring.

Its own attack is melee (slash), so Protect from Melee is the prayer it asks for.

In our index it sits in the standalone boss group at difficulty 3 of 5, where kill times come down to Rex safe spot.

Access Requirements

Dagannoth Rex is gated behind Horror from the Deep.

Horror from the Deep also tends to sit alongside the other standalone boss gates, so it is usually cheaper to clear them together than to come back for each one. The boss requirements checklist lists them by group.

Location and How to Get There

Dagannoth Rex is found in the depths of the Waterbirth Island Dungeon, alongside Prime and Supreme.

Sail to Waterbirth Island from Rellekka and descend through the dungeon. All three Kings share one room, so your route planning is really about which King you intend to fight without aggroing the other two.

Recommended Combat Stats and Gear

Inventory and Supplies

• Food sized to its max hits: 26.
• Prayer potions for Protect from Melee.
• Runes for thralls, which do land here.
• A teleport out.

Mechanics: Attack Styles, Max Hits and Immunities

Where Dagannoth Rex Sits in Progression

Within the standalone boss group, the fights below Dagannoth Rex are Barrows brothers and Deranged Archaeologist. Above it sit Corporeal Beast and The Nightmare.

Fight Strategy: Rex safe spot

1. Prayers on before you are in range.
2. Turn on Protect from Melee and leave it on.
3. Its lowest defence bonus is against magic.
4. Its 4-tick speed punishes greed.
5. Bank before a 26 can erase you.

• Rex is the learner King
• Safe spot before you greed DPS
• Berserker / warrior rings need volume
• Bring a leave plan if Prime/Supreme agro
• Best first DK

Drops and What Dagannoth Rex Is Worth

Drops worth the trip: Berserker ring. Whether that is worth your time depends on how many kills an hour you personally get, which is a function of Rex safe spot rather than of your gear list.

Combat Achievements

Dagannoth Rex has Combat Achievement tasks. With a 26 max hit the restrictions are mostly about execution rather than survival.

Task lists move with updates — read the current list in game.

Combat Achievements guide

Ironman Notes

Slayer masters who assign Dagannoth Rex: Vannaka, Chaeldar, Konar, Nieve, Duradel. Each kill is 331.4 Slayer XP.

Without a Grand Exchange, berserker ring has to be earned rather than bought, and this is the fastest table it sits on.

Common Mistakes and Death Causes

• Ignoring that rex is the learner King
• Ignoring that safe spot before you greed DPS
• Ignoring that berserker / warrior rings need volume
• Ignoring that bring a leave plan if Prime/Supreme agro
• Buying an upgrade before Rex safe spot is consistent
• Gearing for Dagannoth Rex before finishing Horror from the Deep
• Walking in before prayers are on

FAQ

What do I need to fight Dagannoth Rex?

Horror from the Deep

Which protection prayer should I use at Dagannoth Rex?

It attacks with slash, so pray against that.

How hard does Dagannoth Rex hit?

Max hits of 26, with 255 hitpoints.

Where is Dagannoth Rex and how do I get there?

The depths of the Waterbirth Island Dungeon, alongside Prime and Supreme. Sail to Waterbirth Island from Rellekka and descend through the dungeon. All three Kings share one room, so your route planning is really about which King you intend to fight without aggroing the other two.

Is Dagannoth Rex worth doing?

Yes, for what it drops — Berserker ring — if you want that specific reward. It is not a general money maker, and we do not publish a GP per hour figure for it because that number changes with the Grand Exchange.

What kills people at Dagannoth Rex?

Rex is the learner King

Related Guides

• Dagannoth Kings Guide Tribrid Setup Rotation Solo Strategy
• PvM progression guide
• Best bosses for money
• Combat Achievements guide

Bottom Line

The honest summary of Dagannoth Rex is that Rex safe spot is the whole difficulty, and it is learnable in an evening. After that the only variable left is how many trips you are willing to do for berserker ring.

If Dagannoth Rex is blocking a Combat Achievement or an unlock you actually want, our PvM service is done by hand — no automation. Otherwise the bosses list has the full index.