OSRS Dagannoth Prime Guide: Weakness, Ranged Gear & Drops

Dagannoth Prime at a Glance

Dagannoth Prime is the magic-based Dagannoth King: level 303, 255 hitpoints, and a magic attack that hits up to 50 every 4 ticks. Kill him with ranged. His defence against arrows, bolts and darts is 10, while melee and magic both face 255. Keep Protect from Magic on for the whole fight and attack from the north-east corner of the lair, out of reach of Rex and Supreme.

He is the only monster that drops the seers ring and the mud battlestaff, at 1/128 each, and like the other two Kings he can drop the dragon axe at 1/128. Every kill also gives dagannoth bones and a dagannoth hide.

His attack looks like Water Wave and lands on everyone in a 3x3 area around his target, so keep your distance from other players. Two unprayed hits can kill most accounts, which is why the prayer goes on before you climb down the ladder.

Requirements: No Quest Needed

No quest unlocks Dagannoth Prime. Horror from the Deep is not required for any of the Kings. What stops you is the route through Waterbirth Island Dungeon:

• Two pressure pads at the far end of the first cavern need two people. Solo, drop a pet rock on one of them. Askeladden hands you one during or after The Fremennik Trials.
• Three door supports block the central room. From the north or south path, use a rune thrownaxe special attack on the middle (western) support and it bounces through all three.
• 85 Agility skips both: the rocks south of Jarvald on Waterbirth Island lead to a cave entrance beside the ladder room. A summer pie boosts 80 to 85.
• Jarvald's boat from Rellekka costs 1,000 coins a trip until you finish The Fremennik Trials, then it is free.

Aim for 70+ Ranged and Hitpoints and at least 60 Defence, ideally 80+. Protect from Magic needs 37 Prayer. The boss requirements checklist covers the gates for every other boss.

Location and How to Get There

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

The quickest ways to the island are the Lunar spellbook's Waterbirth Teleport (72 Magic), a POH portal or portal nexus set to Waterbirth, or an enchanted lyre once you have the Hard Fremennik Diary. Otherwise teleport to Rellekka and sail with Jarvald. The run down is long, so bring a stamina potion or an explorer's ring for run energy.

Before you drop in, check who is there: the Kings' ladder and a crack in the safe room beside it both show how many players are in the lair. On a dagannoth Slayer task, the ladder's Slayer option takes you to a task-only copy of the lair.

Recommended Combat Stats and Gear

Good weapons for a Prime-only trip: twisted bow, which gains damage from his 255 Magic level; bow of Faerdhinen with crystal armour; toxic blowpipe, a good pick on a Slayer task; crystal bow; Hunters' sunlight crossbow; and the zaryte, Armadyl, dragon hunter, dragon or rune crossbow.

Pick armour with good ranged defence. Protect from Magic already blocks Prime, so the damage you actually take comes from the Spinolyps in the water around the island, and both of their attacks roll against your ranged defence.

Inventory and Supplies

• Ranging or divine ranging potions.
• Prayer potions or super restores. Each Spinolyp magic hit drains 1 prayer point, about half that with a spectral spirit shield.
• Antidote++ or a serpentine helm. Spinolyp ranged hits poison, starting at 6.
• Food sized for a 50 max hit, plus a Saradomin brew for emergencies.
• Runes for Telekinetic Grab (33 Magic). Prime stays put and attacks from range, so this is how you pick up his drop without walking into the room.
• A pet rock and rune thrownaxe for the doors, unless you have 85 Agility.

Mechanics: Attack Styles, Max Hits and Immunities

Where Dagannoth Prime Sits in Progression

Most players learn Prime second, after Rex, because you range him from the same east side of the room. If you haven't killed Rex yet, the Dagannoth Rex guide shows the east-wall safespot you'll be standing near.

How to Kill Dagannoth Prime

1. 1

   Turn on Protect from Magic before you climb down.

   Prime hits by far the hardest of the three, up to 50, and is very accurate, so he is the one to pray against when you land.

2. 2

   If Prime or Supreme targets you on arrival, climb straight back up and try again.

   Leaving quickly cancels some of the incoming hits.

3. 3

   Once nothing is attacking you, run along the south wall to the east side of the room, then north to the north-east corner.

4. 4

   Attack Prime from there on the Long-range style unless you are sure Supreme cannot notice you.

   Supreme's aggression range is 7 tiles from his south-west tile and Rex's is 5.

5. 5

   Prime does not walk over to you.

   Loot with Telekinetic Grab, or wait until he is dead and no other King is aggressive.

6. 6

   If Prime and Supreme both start attacking, kill Supreme or leave.

   Both attack from long range, so you can't step out of reach of either, and together they can kill you quickly.

From the east wall you can alternate between Prime and Rex: range Prime, then trap Rex on a wall safespot and kill him with magic while Prime respawns. The Dagannoth Kings guide covers the full three-King rotation.

Dagannoth Prime Drop Table

Combat Achievements

Slayer and Ironman Notes

Prime counts for dagannoth tasks from Vannaka, Chaeldar, Konar, Nieve and Duradel and gives 331.4 Slayer XP a kill. On a Konar task he can also drop brimstone keys. In the task-only lair, players who are not on task cannot damage the Kings.

For ironmen the seers ring is the reason to be here, since nothing else drops it. You also need a kill of each King for the Elite Fremennik Diary, and finishing that diary makes the bones drop noted.

Common Mistakes and Death Causes

• Climbing down with no prayer on. A 50 max hit punishes this first.
• Standing next to another player while Prime is attacking either of you. The 3x3 splash hits both.
• Using magic or melee on him. His defence against both is 255.
• Fighting from the west half of the room, where Supreme roams.
• Leaving out antipoison. The Spinolyps poison you even when no King is attacking.
• Walking to the loot while Prime is alive when Telekinetic Grab would do.

FAQ

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