Soloing Old School RuneScape Dagannoth Rex is one of the most consistent mid-level PvM money-makers in the game and an especially important milestone for Iron accounts. Whether you’re farming profit on a main or hunting a Berserker ring upgrade on an Ironman, Rex is the most accessible of the three Dagannoth Kings due to his melee-only attack style and extremely low Magic level.

This guide covers requirements, gear, inventory setup, safe entry, safespot mechanics, and optimisation tips.

Why Kill Dagannoth Rex?

Dagannoth Rex is one of the three kings located in the Waterbirth Dungeon, on Waterbirth Island.

The primary reason to farm Rex:

· Berserker ring drop (huge DPS upgrade for melee builds)

· Consistent rune and alchable drops

· Safe-spot mechanics make him viable at mid-level

· Very accessible for Ironman accounts

Rex attacks exclusively with melee, and because he can be safespotted with Magic, the fight becomes mechanically simple once setup is complete.

Requirements & Recommendations

Minimum Combat Stats

To fight Rex effectively:

· 50 Magic (for Iban’s Blast)

· Completion of Underground Pass (required for Iban’s Staff)

· 40 Defence (absolute minimum)

· 43 Prayer (for protection prayers)

Strongly Recommended:

· 70 Defence (significantly increases survivability from the other kings)

· Higher Magic level for faster kills

· 60+ Hitpoints for safety buffer

Spell Choice

Rex is weak to earth spells and has a Magic level of 0, meaning:

· You do NOT need a high Magic attack bonus.

· Your Magic bonus must NOT go below -65 or you will splash every hit.

Viable Spell Options:

· Iban’s Blast (minimum recommended)

· Earth Blast

· Higher-tier earth spells

· Tumeken’s Shadow (best-in-slot, very fast kills)

Imbuing Iban’s Staff is highly recommended for longer trips.

Getting Into Waterbirth Dungeon

To reach Rex, you must first access Waterbirth Island.

Travel Methods:

· Waterbirth teleport tablet (from the Grand Exchange)

· Enchanted lyre teleport (requires Fremennik hard diary)

· Redirected house teleport to Rellekka and run to the boat

Once on Waterbirth Island, enter the dungeon and head west toward the door section.

Special Entry Requirements

You need ONE of the following:

· Pet rock (from The Fremennik Trials)

· 85 Agility

· A friend to help open the door

If using the pet rock method:

1. Drop the pet rock on the pressure plate.

2. Open the northernmost door.

3. Pick up a pet rock.

If You Do NOT Have 85 Agility

You must bring:

· Rune thrownaxe

· 40 Ranged (to equip it)

Use the special attack on the barricade to break through.

Navigating the Dungeon Safely

You will rotate protection prayers frequently while descending:

· Protect from Magic when climbing certain ladders

· Protect from Ranged in ranged-heavy rooms

· Protect from Melee while running through Dagannoths

Final Descent:

On the final ladder:

· Start with Protect from Melee

· Swap to Protect from Magic while descending

You will arrive in the Dagannoth Kings’ Lair.

Safe Entry Into the Kings’ Lair

This is the most dangerous part of the run.

When descending:

1. Activate Protect from Magic

2. Check if Prime (mage) or Supreme (ranger) attacks you

3. If attacked, immediately climb back up

Always prioritise Protect from Magic — Prime hits harder than Supreme.

Once safely inside:

· Hug the southern wall

· Move east along the perimeter

· Position yourself in the eastern safespot area

How to Safespot Dagannoth Rex

1. Use Magic to attack Rex from a distance

2. Drag him toward the eastern edge

3. Step slightly south to force pathing

4. Rex becomes stuck on terrain

Once trapped:

· Continue casting safely

· Wait for respawn

· Repeat

The fight becomes trivial once positioned correctly.

Inventory Setup

Required:

· Waterbirth teleport

· Pet rock

· Rune thrownaxe (if under 85 Agility)

Recommended:

· 10+ food

· 4–6 Prayer potions

· 1 Stamina potion

· Antipoison (or Antidote++)

· Rune pouch (optional but efficient)

Stackable venom cures (like araxyte venom sacks) are excellent alternatives to traditional antipoisons.

Gear Setup

Core Principle:

You want high Ranged defence, not Magic bonus.

The spinolyps in the room attack with:

· Ranged

· Magic-based ranged

So ranged defence mitigates both.

Minimum Setup

· Iban’s Staff

· High ranged-defence armour

· Barrows gloves or the best available gloves

· Glory/fury for general stats

Remember: ensure Magic bonus stays above -65.

Mid-Level Setup

· Full Guthan’s (for healing between kills)

· Iban’s Staff (imbued)

· God cape

· Occult necklace (if available)

Optional healing weapons:

· Saradomin godsword (spec for HP)

· Toxic blowpipe (for emergency healing)

Best-In-Slot Options

· Tumeken’s Shadow

· Ancestral robes

· Occult necklace

· Tormented bracelet

· Mage Arena 2 cape

Prioritise magic damage % over accuracy.

Trip Sustainability Tips

· Safespot correctly and the damage taken becomes minimal

· Guthan’s healing extends trips

· SGS special restores HP and Prayer

· Always keep antipoison active

· Monitor spinolyps — they are the main chip damage source

Ironman Considerations

For Iron accounts:

· The Berserker ring is a massive melee upgrade

· Rex is the easiest King to isolate

· Supplies can be stretched with proper safespotting

· Mid-level accounts can farm efficiently

Rex is often one of the first serious PvM grinds for Ironmen.

Final Thoughts

Soloing Dagannoth Rex is mechanically simple but execution-heavy in the dungeon navigation phase. Once you master the prayer rotations and safespot positioning, kills become safe and consistent.

If you’re on a main, Rex is a steady OSRS gold profit. If you’re an Ironman, the Berserker ring is a transformative upgrade. With proper preparation, even mid-level accounts can farm Rex comfortably and efficiently.

RSorder Team