Released July 31, 2025, the Doom of Mokhaiotl is Old School RuneScape's newest delve-style boss fight, packed with mechanics, intense floors, and great rewards. Here's everything you need to know to get started slaying the Doom.

Requirements

Final Dawn quest must be completed.

  -It's a lengthy quest, taking 2+ hours blind or around 45 minutes with a guide.

Combat Stats: 80+ across the board is recommended for early floors.

Demonbane Weapons (Dark, Light, and Flame): Highly recommended, especially for handling boss mechanics and adds.

How to Access the Boss

Method 1: Mokhaiotl Waystones

Tradeable waystones – around 400k OSRS GP each on day one.

Use directly to access the encounter instantly.

Method 2: Pendant of Eights Route

1. Use Castory teleport (unlocked via the Pendant).

2. Bring your Quzel and run to Tail Telon to unlock the teleport area.

3. From there, head to the boss's entrance area.

4. At the entrance, open the Ancient Chest and grab Ancient Teleporters.

5. Place one near the lift and another by the boss's door for easy back-and-forth movement.

Recommended Setup

Gear

Twisted Bow is top-tier right now.

Scorching Bow is also useful depending on the phase.

Demonbane weapons are essential for mechanics and add control.

Toxic Blowpipe or similar for spec flexibility.

Inventory Tips

Sandfews Serums: Cure venom and restore stats.

Regen Potions: High value over long fights.

Super Restores / Brews: Better than food for extended floors.

Prayer potions or equivalents – lots of prayer switching involved.

Thalls spellbook: Bring runes for Thraws, Death Charge, and use Dark Demonbane with Purging Staff.

Boss Fight Basics

The Doom of Mokhaiotl is a delve boss – each floor increases in difficulty but gives better loot chances. After completing a floor, you can either claim your loot or go deeper.

General Attack Mechanics

Blue = Magic, Green = Ranged, Red/Orange = Melee

Pray accordingly – hits are punishing if you mispray.

Rock Debris Mechanic

Doom throws a large boulder.

When it lands:

  -Disables your prayers

  -Spawns smaller rocks

Look for blue aura = mage, plain rock = range, and prepare to pray after it bursts.

Charging Phase (Floor 1+)

Boss charges a powerful attack.

Only stopped by hitting with a Melee weapon.

If not stopped, you'll take 60+ damage.

Grub Mechanic

Small grubs crawl toward the boss, healing him if they reach.

Use the appropriate Demonbane weapon to one-shot them.

In later floors, grubs pray against certain styles.

Shockwave & Volatile Earth

Look for Volatile Earth orbs.

Hit two far-apart ones to spawn a protective orb.

Stand in it to survive the incoming shockwave attack (similar to Leviathan's jellyfish shield).

Advanced Floors (Floor 2+)

New Mechanic: Shield Phase

Boss gains a shield bar.

Damage it using any Demonbane weapon.

Popping grubs near the boss deals 100 damage to the shield.

Floor 3: Venom Pools

Acid puddles appear.

Running into them venoms you – avoid at all costs.

Floor 4+: Difficulty Spikes

Increased orb quantity, grub speed, projectile count, and overall attack speed.

The final floors are relentless and will test your stamina and prayer switching.

The Race Car (Final Mechanic)

Boss charges up and dashes across the arena (vroom-vroom).

He'll target a line through or behind you.

  -Avoid the line.

  -Don't lead it through debris – you'll need that later.

Post Dash – Stomp Attack

After dashing, Doom may stomp, dealing heavy damage.

Hide behind debris to mitigate it.

Follow-up projectiles require correct prayer as always.

Why Fight Doom of Mokhaiotl?

Unique rewards

Challenging PvM mechanics

The Delve system offers scaling rewards

A fantastic mix of mechanics that feels fresh in OSRS

If this guide helped you dive into the depths and start your grind, consider sharing it with your clanmates or friends. Best of luck, and may the loot be with you on your delves!