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Doom of Mokhaiotl: grubs

This article is compiled from the videos of GnomonkeyRS. It records what Gnomonkey said, with sources, not verified game fact. See About.

Doom of Mokhaiotl: grubs

Doom of Mokhaiotl: grubs
Type Mechanic
Videos 2 (first 2025-07-23, latest 2025-08-09)
Main source DOOM DELVE BOSS GUIDE (OSRS)

Doom of Mokhaiotl: grubs is a mechanic topic that Gnomonkey covers in 2 videos between 2025-07-23 and 2025-08-09. This article is a stub: his statements are grouped by type, repeated ones merged.

Contents

Methods

  • Doom of Mokhaiotl grubs die in one hit to any demonbane weapon they are not praying against; they have two health and non-demonbane weapons do one damage, so you want demonbane to tag them quickly because there are many grubs later.1
  • Grubs spawn in the corners of the Doom of Mokhaiotl room and must be killed before they reach the boss; if they reach its centre they hurt you a little and heal the boss, compounding over the run.2

Stats and numbers

  • Doom of Mokhaiotl's grubs move to the centre of the boss and, on arrival, heal it for around 10 health and damage you for 1 to 15; Gnomonkey says this punishment is very minor and never changes in later caves.1
  • When a Doom of Mokhaiotl grub dies it does a 3x3 AoE of about 15 damage; in melee range you have one tick after killing it to step out of the way.3
  • Attacking Doom of Mokhaiotl grubs is zero tick: you can attack them while on cooldown from attacking the boss without losing any ticks.4
  • Spells (manually cast or staff-cast demonbane) against Doom of Mokhaiotl grubs are not zero tick: you must be off cooldown for them to land, which Gnomonkey says feels like a bug that may be changed.5
  • On Doom of Mokhaiotl cave 8, grubs spawn in triples; Gnomonkey prefers to simply get rid of them quickly since too much else is happening to take advantage of the bonus damage.6
  • You have until a grub reaches the boss's centre, plus one extra tick, to hit it; once you attack a grub it cannot move, and killing it causes a shockwave hitting up to about 20 if you are next to it, but a shockwave touching the boss cannot hurt you.7
  • Grubs pray protection styles: one at the start, and later two styles at once, coloured, so you need the exact Demon bane weapon; Gnomonkey recommends the Demonic larva plugin from the plugin hub to highlight and colour them.8
  • After the most recent patch Doom of Mokhaiotl has big grubs that take only two shots, instead of the old triple grub spawn, with the same shockwave damage as a small grub.9

Tips

  • Killing a grub next to or under the Doom of Mokhaiotl makes its explosion damage the boss (about 8 damage in his example) and not you; the grubs always go to a corner, so stand near that corner.4
  • To ignore a Doom of Mokhaiotl grub if reaching it forces you into venom or a melee hit, since it only heals the boss about 10 and hurts you very little.10
  • In the Doom of Mokhaiotl car phase a grub on the field usually despawns before it reaches the car, so you usually do not have to tag grubs during the car phase.11
  • Not to greed grubs at the Doom of Mokhaiotl: they only deal around 3 to 4 damage, and he kept dying from going out of his way to tag them.12
  • Melee grubs are the main struggle on delve 4 because they are awkward to catch depending on acid placement.13

Revision history

Date Video Change
2025-08-09 Ironman Budget Doom Delve Boss Guide (OSRS) (NEW) Added: 5 statements (method, stat, tip)
2025-07-23 DOOM DELVE BOSS GUIDE (OSRS) Page created: 10 statements (method, stat, tip)
## See also

References

  1. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 8:53 ↩↩

  2. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 10:45 ↩

  3. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 9:25 ↩

  4. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 9:51 ↩↩

  5. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 10:22 ↩

  6. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 17:47 ↩

  7. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 11:17 ↩

  8. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 11:47 ↩

  9. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 36:18 ↩

  10. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 25:11 ↩

  11. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 29:05 ↩

  12. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 30:34 ↩

  13. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 21:15 ↩

Mechanics

Colosseum invocations • Yama contracts • Invocations (Tombs of Amascut) • Jal-ImKot • Inferno pillars • Jal-Ak • Alt account • Thralls • Nex gear setup • Tempoross • Turael • Inferno waves • Jal-Nib • Doom of Mokhaiotl: rock block method • Monkey Room • Fortis Colosseum pillars • Phantom barrage • Awakened bosses • Melee gear progression • Demonic Brutus • Jal-MejRah • Prayer flicking • Butterfly Tech • Fortis Colosseum setup • Doom of Mokhaiotl: melee punish • Sulliuscep • Botting • Off-ticking • Corner trapping • Doom of Mokhaiotl: car attack • Combat Achievements • Doom of Mokhaiotl: shield phase • Pest Control • Blood Barrage • Nylocas • Great Olm 4-1 method • Nex reset • Triple Jad • RuneScape 3 combat • Tightrope skip

Category: Mechanics