OSRS Dagannoth Rex Guide: Safespot, Magic Setup & Drop Table

Dagannoth Rex at a Glance

Dagannoth Rex is the melee Dagannoth King: level 303, 255 hitpoints, and slash attacks that hit up to 26. His magic defence bonus is 10 and his Magic level is 0, so you kill him with magic. The standard method is to pull him onto a wall on the east side of the lair, where he gets stuck and cannot reach you, and cast at him from that safespot.

Rex is the only monster that drops the berserker ring and the warrior ring, at 1/128 each, and he shares the 1/128 dragon axe with the other two Kings. He is the easiest of the three, which is why most players learn DKs on Rex before trying Prime or Supreme.

Requirements: No Quest Needed

Rex has no quest requirement, and Horror from the Deep has nothing to do with him. The only thing between you and the lair is the door puzzle in Waterbirth Island Dungeon:

• The pressure pads at the end of the first cavern need two players, or one player and a pet rock. Askeladden gives you a pet rock during or after The Fremennik Trials.
• The three door supports behind them come down together if you take the north or south path and use a rune thrownaxe special attack on the middle (western) support.
• With 85 Agility (boostable from 80 with a summer pie) you can skip the pad and the supports by climbing the rocks south of Jarvald on Waterbirth Island.
• Jarvald charges 1,000 coins per crossing from Rellekka until The Fremennik Trials is done.

Aim for 75+ Magic and at least 60 Defence, ideally 80+. Protect from Melee needs 43 Prayer. Other bosses' gates are in the boss requirements checklist.

Location and How to Get There

Rex spawns and roams on the south-eastern side of the Dagannoth Kings' lair, on the sixth and deepest level of Waterbirth Island Dungeon. Prime is north-east of him and Supreme is on the west side.

Get to Waterbirth Island with the Lunar Waterbirth Teleport, a POH portal or nexus, or an enchanted lyre after the Hard Fremennik Diary, or teleport to Rellekka and take Jarvald's boat. Peek through the Kings' ladder or the crack in the safe room next to it to see how many players are inside. On a dagannoth task, use the ladder's Slayer option for the task-only lair.

Dagannoth Rex Safespot: How to Trap Him

The safespot works because Rex is size 3 and only uses melee. If he walks into one of the ridges of the lair while chasing you, he stays stuck there and cannot hit you. Rex gets stuck on the north-east, south-east and north-west walls. The south-east is the usual choice because Prime rarely, if ever, wanders down there.

1. 1

   Turn on Protect from Magic before you climb down, in case Prime or Supreme targets you as you land.

2. 2

   If nothing is attacking you, run along the south wall to the east side of the room.

   If something is, climb back up and try again.

3. 3

   From the east wall, hit Rex with a long-range spell to pull him over, and switch to Protect from Melee as he comes.

4. 4

   Step north or south along the wall until he stops moving and cannot reach you.

   That is the safespot. Cast from there.

5. 5

   Stay in the south-east part of the room.

   Rex's aggression range is 5 tiles from his south-west tile, but Prime's and Supreme's are 7, so walking west to lure Rex can pull both of them in. Prime almost never walks into the south-east.

You can log out on the safespot and come back to the same tile. Logging out needs 10 seconds out of combat, though, and the Spinolyps keep attacking, so you have to kill or submerge enough of them first.

Recommended Combat Stats and Gear

Good magic options: Sanguinesti staff, Eye of Ayak, trident of the swamp or seas, Iban Blast, Magic Dart, and earth spells such as Earth Wave to use his earth weakness. His magic defence is low enough that you can wear full melee armour and still hit him consistently, even with a negative magic attack bonus. That armour's high ranged defence is what keeps Spinolyp damage down.

For long trips, heal off Rex and the Spinolyps between kills with blood spells, the Sanguinesti staff, a full Guthan's set or Saradomin godsword specials. A regen bracelet or Hitpoints cape speeds up natural regeneration on top of that.

Inventory and Supplies

• Runes for your main spell, plus blood spell runes if you heal that way.
• Prayer potions or super restores for Protect from Melee and the Spinolyp prayer drain (1 point per magic hit).
• Antidote++ or a serpentine helm, because Spinolyp ranged hits poison.
• A few sharks or anglerfish. With a working safespot most damage comes from Spinolyps, which hit up to 10.
• A pet rock and rune thrownaxe, unless you have 85 Agility.
• A herb sack for the grimy ranarr weed Rex drops at 7/128.

Mechanics: Attack Styles, Max Hits and Immunities

Where Dagannoth Rex Sits in Progression

Rex is the usual first King, because once he is stuck on the wall he can't hit you and the only damage left comes from the Spinolyps. Once Rex feels easy, Prime is the natural next King because you can range him from the same east side of the room. The Dagannoth Kings guide explains how to add Prime and Supreme into one rotation.

Dagannoth Rex Drop Table

Combat Achievements

Slayer and Ironman Notes

Rex counts for dagannoth tasks from Vannaka, Chaeldar, Konar, Nieve and Duradel and gives 331.4 Slayer XP a kill. Konar tasks can add brimstone keys to his drops.

Ironmen usually come to Rex for the berserker ring, which nothing else drops. Rex alone from the safespot is also the cheapest way to get the Elite Fremennik Diary's Rex kill done before you learn the other two.

Common Mistakes and Death Causes

• Luring Rex past the middle of the room, which can pull Prime and Supreme in.
• Meleeing or ranging him. His defence against both is 255.
• Landing with no prayer on, then taking a Prime hit before you reach the east wall.
• Sitting on the safespot without antipoison.
• Wearing mage robes. Melee armour's ranged defence is what keeps Spinolyp damage low.

FAQ

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