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Doom of Mokhaiotl: shield phase

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: shield phase

Doom of Mokhaiotl: shield phase
Type Mechanic
Videos 4 (first 2025-07-23, latest 2025-08-22)
Main source DOOM DELVE BOSS GUIDE (OSRS)

Doom of Mokhaiotl: shield phase is a mechanic topic that Gnomonkey covers in 4 videos between 2025-07-23 and 2025-08-22. This article is a stub: his statements are grouped by type, repeated ones merged.

Contents

Methods

  • In the Doom of Mokhaiotl's first shield attack the boss puts its shield together and does a ranged/mage prayer attack; you just melee it (for example with an Ember light), which immediately breaks the shield; if you do not, it hits for 60 to 99 damage.1
  • From cave 3 the Doom of Mokhaiotl shield is blue and can only be damaged with demonbane, not touching the boss's normal health; a yellow bar charges up to a 60-99 damage attack (99 later), and each demonbane tag stuns the boss and resets that charge.2
  • To break the Doom of Mokhaiotl shield fastest, tag the constantly spawning grubs next to the boss: each does 100 shield damage guaranteed, versus 10 normally; do shots in between, and the boss does not melee during this phase, so you can stand within melee range.3
  • From cave 4 the Doom of Mokhaiotl shield-phase grubs are coloured and pray two prayers; you must tag each with the style matching its colour with no exception, e.g. red grubs require melee.4
  • When you have no spec energy left before the Doom of Mokhaiotl car phase, Gnomonkey stalls the shield phase by keeping grubs from reaching the boss, which lets the Lightbearer recharge your spec and gives a second double Death Charge as the timer ticks.5
  • While stalling, Gnomonkey lets melee grubs go into the boss because they are hard to remove with acid around, and tags all others with a Dark light.6
  • In the Doom of Mokhaiotl shield phase (from delve 3) the boss has a blue shield and yellow charge bar; only Demon bane hits damage the shield and each Demon bane hit resets the yellow bar, otherwise the laser hits up to 99.7
  • During shield phase grubs spawn and each one popped does 100 shield damage; Gnomonkey sits in melee range because the boss cannot melee during shield phase and grub shockwaves hitting the boss do not hurt you.8

Stats and numbers

  • There is a hidden mechanic: the longer the Doom of Mokhaiotl shield phase takes, the larger a bonus hit splat you deal after it ends, which Gnomonkey says is capped at 50 damage after a cap was added; the one-shot short worked because it was not yet capped.9
  • The bonus hit splat waits for your first attack, so your Zaryte crossbow spec takes effect before it; if you stall until you get your Zaryte crossbow spec back you get roughly a 40 to 50 bonus hit splat.6
  • In his example the Zaryte crossbow after stalling did 38 damage as the bonus hit splat, and a Ruby bolt spec did 91 because it landed right before the bonus hit splat.10
  • Doom of Mokhaiotl shield phase always triggers at 75% boss health, so any time you take the boss below 75% it goes into shield phase.11
  • There is a bonus hitsplat after shield phase of around 20 to 30 damage that grows the longer the shield phase took; Gnomonkey made a shield phase last about 15 minutes to one-shot Doom of Mokhaiotl before Jagex capped it at 50, reached after roughly 90 seconds.12

Tips

  • In the Doom of Mokhaiotl cave 4 shield phase, the red melee grubs are the hardest because the boss also spits acid that venoms you (like the monkey room), and mage grubs require you to be off cooldown.4
  • To brew up during the Doom of Mokhaiotl shield phases (equally easy on caves 5 and 8), because the boss is not doing much and your damage matters less, making it a great time to heal.13
  • Gnomonkey describes milking the shield phase: the longer it lasts, the larger the bonus hitsplat, up to about 50 damage after roughly 90 seconds, but he says it is rarely worth it except when low on health and needing spec for pipe specs.14
  • Any damage dealt right before 75% carries past the shield phase, so a melee punish close to 75% brings the boss's health down and reduces the chance of an orb phase.15

Gnomonkey's opinion

  • Gnomonkey says the Doom of Mokhaiotl shield phase gives Muzzah-style vibes (cracking through a shield), which is why it was described as a mix of Leviathan and that style of fight.2
  • Gnomonkey says extra shots from the parking lot tech, a stalled extra Zaryte crossbow spec and the bonus hit splat together give the highest odds of skipping the orb phase.16
  • Gnomonkey criticises the second shield phase after the orb phase at Doom of Mokhaiotl as slowing the pace and, because it is a free chance to use support specs, making things easier for record delvers; he compares it to Muspah's second smite phase.17
  • Gnomonkey says the shield phase bonus hitsplat rewards doing the phase worse (less damage, worse weapons) and should instead reward snappy play such as hitting grubs near the boss's centre.18
  • Gnomonkey would change the shield phase to reward clearing grubs quickly instead of milking, and would remove the second shield phase so the boss simply repeats its normal attack pattern until dead.19

Revision history

Date Video Change
2025-08-22 The Good and Bad of Endgame (OSRS) Added: 4 statements (opinion, stat)
2025-08-09 Ironman Budget Doom Delve Boss Guide (OSRS) (NEW) Added: 5 statements (method, stat, tip)
2025-07-31 NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS) Added: 6 statements (method, opinion, stat)
2025-07-23 DOOM DELVE BOSS GUIDE (OSRS) Page created: 7 statements (method, opinion, tip)
## See also

References

  1. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 10:53 ↩

  2. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 11:20 ↩↩

  3. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 11:53 ↩

  4. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 12:52 ↩↩

  5. NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS), 2025-07-31. ▶ 20:28 ↩

  6. NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS), 2025-07-31. ▶ 21:32 ↩↩

  7. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 17:13 ↩

  8. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 18:10 ↩

  9. NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS), 2025-07-31. ▶ 20:59 ↩

  10. NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS), 2025-07-31. ▶ 22:30 ↩

  11. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 20:41 ↩

  12. The Good and Bad of Endgame (OSRS), 2025-08-22. ▶ 18:10 ↩

  13. DOOM DELVE BOSS GUIDE (OSRS), 2025-07-23. ▶ 31:42 ↩

  14. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 18:41 ↩

  15. Ironman Budget Doom Delve Boss Guide (OSRS) (NEW), 2025-08-09. ▶ 27:27 ↩

  16. NEW ROCKBLOCK GUIDE FOR DOOM DELVE (OSRS), 2025-07-31. ▶ 23:00 ↩

  17. The Good and Bad of Endgame (OSRS), 2025-08-22. ▶ 14:54 ↩

  18. The Good and Bad of Endgame (OSRS), 2025-08-22. ▶ 18:29 ↩

  19. The Good and Bad of Endgame (OSRS), 2025-08-22. ▶ 23:00 ↩

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