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Jal-Ak

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

Jal-Ak

Jal-Ak
Type Inferno monster
Location Inferno
Appears After wave 41
Max hit 29 (blob); 18 (bloblets)12
Attack speed 6 ticks13
Value as healing About 40 health per phantom Blood Barrage45
Weakness Blood Barrage healing; one-tick alternating prayers67
Videos 9 (first 2021-05-21, latest 2026-07-13)
Main source Inferno Teaching Stream - Mage Rebalance (OSRS)

Jal-Ak (the blob) is an Inferno monster that attacks with magic or ranged from a very long distance. Gnomonkey calls it the bane of every first-cape player's existence and the hardest thing a player deals with, but easy once the player is good at the Inferno18. It is the mob people struggle with most because of its prayer cycle, and it is what ends up getting newer players killed, yet it is not the most dangerous mob in the Inferno and is very easy to handle once understood910.

The blob is also valued as a "medkit". Killing it and its bloblets with a phantom Blood Barrage heals about 40 health, which is more than any other target45117. Gnomonkey's standard approach is to learn one-tick alternating prayers to avoid all of its damage, and to leave it for last in a wave so that its health is available if a flick elsewhere goes wrong121314.

Contents

Attack cycle

A blob has a six-tick attack cycle. It reads the player's active protection prayer on the third tick and, three ticks later, attacks with the opposite style (mage if the player is praying ranged, ranged if praying mage)11531617181920. A blob that sees the player step out from behind the pillar reads the prayer immediately, on the first tick it sees them, and attacks three ticks later, then continues every six ticks, so it goes read, attack, read, attack12119. If the player is praying nothing or Protect from Melee when it reads, it fires a random attack1.

Its mage hit is about twice as dangerous as its ranged hit. The ranged hit does about half the damage of the mage hit and is almost always a zero against a player praying mage2223. If a player stands next to a blob, it can also melee about one time in three; a blob melee hit maxes the same number and is not a big deal24.

Handling the prayer cycle

One-tick alternating

Swapping protection prayers every game tick means the blob never lands a hit, wherever it is in the arena and not only behind a pillar6425132627. The setup can allow one hit through (a 50-50 if unlucky) while the blob corrects, and after that it is fully consistent627. The timing is to click the next prayer as soon as the current prayer light turns off, keeping both lit28. While alternating, the blob stops being a problem for the player29.

Because a blob always ends its sixth tick on the opposite prayer, alternating lets the player flick other mobs at the same time, and it solves many later waves in which a blob is combined with another monster30132631. To alternate while another attacker threatens, the player clicks that attacker (for example a ranger), watches its animation and starts alternating when the animation starts32. On a double-blob wave such as wave 48, the blobs do not need to be watched, only the mage or ranger: as soon as it flickers, alternating starts333431.

Two-tick alternating and a missed read

In 2021 Gnomonkey recommended alternating either every tick or every two ticks to negate blobs entirely, and suggested entering the Inferno with just a blowpipe to practise on the first blobs35. By 2024 he had changed his position on two-tick alternating: it is a 50-50 whether the player is on a bad tick, so he does not recommend it for learners or first capes3637. It needs the player to know which tick of the blob cycle they are on, and its only benefit is time for switches between prayers that a first cape will not make37. The player knows they are on the right two-tick cycle when the attack starts on the second tick of the prayer38.

After a missed blob attack, he advises defaulting to Protect from Magic, because the mage attack is about twice as dangerous as the ranged attack23.

Learning it

He suggests practising the default timing on the first blob wave for about 10 minutes until the player stops taking damage, and experimenting with the first blobs of a first Inferno91339.

Bloblets

When a blob dies it takes four ticks to spill its bloblets, time that can be used to kill other mobs40. It splits into three smaller bloblets: red melee, green ranged and blue mage241. Each has 15 HP and maxes an 182. They cannot realistically be tanked and should be killed or safe-spotted straight away, ideally by switching to mage gear and sending an Ice Barrage or Blood Barrage2. A bloblet does the same damage as a bat, so they should not be left to sit and hit the player42.

The mage bloblet hits by far the hardest, about double the others, and is surprisingly accurate, up to 18; Gnomonkey says to pray mage whenever tanking a set of bloblets and, if nothing else is in play, against bloblets in general434445. After killing the ranger bloblet the player should swap to mage, since the mage bloblet can chunk them down to 70 health before a hard wave like 6346.

Healing from blobs

Blobs and their bloblets are one of the best targets for regaining health with Blood Barrage because phantom heals work on all three bloblets2547. Sending a phantom Blood Barrage after killing all three bloblets can heal as much as 40 health. Gnomonkey did not know this on his first cape and now uses it all the time48. Three bloblet targets can be hit at once, for about 40 health per bloblet stack4947. Standing on the corner of a blob lines the bloblets up in a triangle so one cast hits all three, and the Twisted bow usually one-shots a blob40. The bloblets and the Mother Blob have 95 defence, so they are a poor target for Saradomin godsword specs2.

Positioning matters for the heal:

  • A blob left behind the pillar cannot be phantomed, so it should be dragged up to the pillar area first, so that bloblets spawn in a better position to heal off. Gnomonkey says never to kill a blob away from a pillar505114. The blobs also cannot be phantom barraged on the south pillar52.
  • In 2022 he said he liked to kill blobs in the position where they could not be phantomed, to take them out of the picture53. Later claims prefer the pillar approach and describe killing a blob early as mostly useless5414.
  • Barraging the southwest tile of a melee hits the bloblets and heals while killing things faster55.

Kill order

He leaves blobs for last when in a good phantom position, since they are a giant medkit and a missed flick elsewhere may cost a 40561214. He rarely kills the blob first, and calls the one spawn with both blobs beside the mage a very rare solve57. Killing a blob early usually does nothing useful: it respawns, and the bloblets only generate damage, so sometimes it is better to do nothing than to shoot the blob54.

Double blobs

In 2021 Gnomonkey called any wave with double blobs dangerous, since two sets of missed flicks risk a knockout58. Later he states that two blobs attack on the same game tick as one, so one-tick alternating handles both and both can be phantomed3359. With two blobs, he kills the one further back first, gives its bloblets a single cast, then kills the next blob and lets the leftover melee bloblet stack with the next set60.

Other tips

  • For a melee corner trap, click around the corner first and then down, rather than straight onto the corner trap tile, because pathing through the melee can give it about a 50% chance of leaving the trap61.
  • Keep a special attack from ending a wave, because pipe specs land a tick slower than a regular shot62.
  • A respawned blob has an eight-tick respawn that aligns with its attack cycle29.

Revision history

Date Video Change
2026-07-13 YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS) Added 10-minute practice drill, two blobs attack on the same tick, and never killing a blob away from a pillar.
2025-12-07 NEW Golden Trio for First Inferno Cape (OSRS) Added bloblet accuracy (mage bloblet up to 18) and advice that killing a blob early is often pointless.
2025-07-13 EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS) Added double-blob kill order, melee corner trap and spec advice.
2025-02-26 EASY MID GAME INFERNO GUIDE (OSRS) Added first-time practice advice, dragging blobs to the pillar and the four-tick death delay.
2024-10-03 INFERNO IS FREE NOW! Bofa Guide (OSRS) Changed opinion on two-tick alternating (was recommended in 2021, now advised against for first capes). Added respawned blob timing.
2024-06-13 Inferno Teaching Stream - Mage Rebalance (OSRS) Added alternating timing (next prayer when light turns off), three-bloblet barrage and wave 48 advice.
2024-01-17 IRONMAN Inferno Teaching Stream (OSRS) Added one-tick alternating (consistent after the setup hit), works from anywhere, bloblets and kill-order advice.
2022-07-22 Inferno (Twisted Bow) Teaching Stream OSRS Added 40 HP medkit value, leaving blobs for last, and killing them where they cannot be phantomed.
2021-05-21 Inferno Guide OSRS (Waves + Triple Jads + Zuk) Page created: first-cape advice on blobs, wave 4 onward, six-tick cycle, bloblet stats and Blood Barrage healing.
## See also

References

  1. Inferno Guide OSRS (Waves + Triple Jads + Zuk), 2021-05-21. ▶ 12:54 ↩↩↩↩↩↩↩

  2. Inferno Guide OSRS (Waves + Triple Jads + Zuk), 2021-05-21. ▶ 13:56 ↩↩↩↩↩↩

  3. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 4:24 ↩↩

  4. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 5:24 ↩↩↩

  5. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 13:56 ↩↩↩

  6. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 4:53 ↩↩↩

  7. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 12:36 ↩↩

  8. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 3:55 ↩

  9. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 26:36 ↩↩

  10. EASY MID GAME INFERNO GUIDE (OSRS), 2025-02-26. ▶ 11:53 ↩

  11. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 27:12 ↩

  12. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 17:11 ↩↩

  13. EASY MID GAME INFERNO GUIDE (OSRS), 2025-02-26. ▶ 11:25 ↩↩↩↩

  14. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 37:23 ↩↩↩↩

  15. Inferno (Twisted Bow) Teaching Stream OSRS, 2022-07-22. ▶ 3:56 ↩

  16. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 12:20 ↩

  17. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 8:22 ↩

  18. EASY MID GAME INFERNO GUIDE (OSRS), 2025-02-26. ▶ 10:47 ↩

  19. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 7:39 ↩↩

  20. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 10:31 ↩

  21. Inferno (Twisted Bow) Teaching Stream OSRS, 2022-07-22. ▶ 13:24 ↩

  22. Inferno (Twisted Bow) Teaching Stream OSRS, 2022-07-22. ▶ 35:59 ↩

  23. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 40:58 ↩↩

  24. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 30:42 ↩

  25. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 8:41 ↩

  26. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 8:37 ↩↩

  27. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 11:28 ↩↩

  28. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 13:23 ↩

  29. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 33:44 ↩↩

  30. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 25:09 ↩

  31. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 55:53 ↩↩

  32. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 20:13 ↩

  33. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 31:46 ↩↩

  34. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 38:37 ↩

  35. Inferno Guide OSRS (Waves + Triple Jads + Zuk), 2021-05-21. ▶ 13:23 ↩

  36. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 9:20 ↩

  37. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 11:57 ↩↩

  38. INFERNO IS FREE NOW! Bofa Guide (OSRS), 2024-10-03. ▶ 9:54 ↩

  39. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 11:02 ↩

  40. EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS), 2025-07-13. ▶ 31:54 ↩↩

  41. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 9:08 ↩

  42. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 26:38 ↩

  43. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 5:57 ↩

  44. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 12:26 ↩

  45. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 57:37 ↩

  46. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 23:24 ↩

  47. EASY MID GAME INFERNO GUIDE (OSRS), 2025-02-26. ▶ 11:55 ↩↩

  48. Inferno Guide OSRS (Waves + Triple Jads + Zuk), 2021-05-21. ▶ 24:12 ↩

  49. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 14:51 ↩

  50. EASY MID GAME INFERNO GUIDE (OSRS), 2025-02-26. ▶ 55:00 ↩

  51. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 11:29 ↩

  52. Inferno Teaching Stream - Mage Rebalance (OSRS), 2024-06-13. ▶ 36:11 ↩

  53. Inferno (Twisted Bow) Teaching Stream OSRS, 2022-07-22. ▶ 20:47 ↩

  54. NEW Golden Trio for First Inferno Cape (OSRS), 2025-12-07. ▶ 1:04:13 ↩↩

  55. EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS), 2025-07-13. ▶ 35:30 ↩

  56. Inferno (Twisted Bow) Teaching Stream OSRS, 2022-07-22. ▶ 17:46 ↩

  57. IRONMAN Inferno Teaching Stream (OSRS), 2024-01-17. ▶ 51:21 ↩

  58. Inferno Guide OSRS (Waves + Triple Jads + Zuk), 2021-05-21. ▶ 25:30 ↩

  59. YOU CAN GET YOUR FIRST INFERNO COMPLETED WITH THESE (OSRS), 2026-07-13. ▶ 27:58 ↩

  60. EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS), 2025-07-13. ▶ 17:07 ↩

  61. EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS), 2025-07-13. ▶ 18:02 ↩

  62. EASY INFERNO: SUB 65 MINUTE GUIDE (OSRS), 2025-07-13. ▶ 44:50 ↩

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