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Yakamaru is the second boss of the Liberation of Mazcab raid. Yakamaru can be looted once every 2 days for rewards including the superior versions of Teralith, Primeval and Tempest equipment. This boss can only be fought after killing the first boss of the instance, Beastmaster Durzag, at least once. Yakamaru spawns jellyfish and different variations of jellyfish: Durable, Magical, Piercing, Reflecting Jellyfish and Meleefish. It also has a phase where it creates 4 versions of itself.

According to the fifth stone fragment, Yakamaru was once a spiritual guardian that helped to protect the inhabitants of Mazcab, but fell victim to the corrupting mind magic of the airut shaman, and is now bound to serve them for a more destructive purpose.

Killing Yakamaru for the first time grants 500 reputation with the goebies.


Feat Details
Better not touch Defeat Yakamaru with all but one member of the raid still poisoned
Day at the aquarium Defeat Yakamaru with one durable jellyfish and one reflecting jellyfish still alive
How to make friends and influence people Use Asphyxiate on Yakamaru's north pool and have the whole raid survive
All together now Defeat all four images of Yakamaru within ten seconds
Rewind After defeating all of the images of Yakamaru, allow the consumption of a Durable Jellyfish and then kill it


When Yakamaru is killed, its helmet remains and acts as a reward coffer to collect the drops. Yakamaru has several drop tables that are rolled on to constitute the loot. The consumable table is always rolled, summoning charms are commonly received, and tertiary drops may be received. If the unique drops table rolls either a Mazcab ability codex or piece of achto equipment, the main drop will not be received. If the unique drops table rolls Teci, the main drop table will be rolled multiple times.


Item Quantity Rarity GE price
Cooked eeligatorCooked eeligator6–9Common4,536–6,804
Super restore (4)Super restore (4)7–10Common19,586–27,980
Saradomin brew (4)Saradomin brew (4)7–10Common139,160–198,800

Main drop

Item Quantity Rarity GE price
Rune spearRune spear20–54Uncommon203,700–549,990
Rune platebodyRune platebody15–66Uncommon562,200–2,473,680
Ascendri bolts (e) 4Ascendri bolts (e)25Uncommon239,000
Yew logsYew logs303–499Uncommon50,601–83,333
Magic logsMagic logs210–689Uncommon79,800–261,820
Black dragonhideBlack dragonhide102–258Uncommon355,164–898,356
Water talismanWater talisman71–281Uncommon179,488–710,368
Raw rocktailRaw rocktail109–300Uncommon490,282–1,349,400
Raw sharkRaw shark114–150Uncommon162,678–214,050
Runite oreRunite ore50–155Uncommon70,950–219,945
Rune barRune bar25–54Uncommon74,625–161,190
Grimy lantadymeGrimy lantadyme43–60Uncommon324,693–453,060
Grimy dwarf weedGrimy dwarf weed42–102Uncommon355,992–864,552
Uncut dragonstoneUncut dragonstone23–46Uncommon277,771–555,542
Hydrix bolt tips 5Hydrix bolt tips30–65Uncommon270,420–585,910
Airut bonesAirut bones61–222Uncommon473,848–1,724,496
Sirenic scaleSirenic scale3–4Uncommon2,096,166–2,794,888
Crystal keyCrystal key10–32Uncommon218,110–697,952


Only one burial charm may drop at a time. The burial charm table and effigy table are not linked - a player may receive drops from one, both, or neither.

Item Quantity Rarity GE price
Small goebie burial charmSmall goebie burial charm1CommonNot sold
Goebie burial charmGoebie burial charm1UncommonNot sold
Large goebie burial charmLarge goebie burial charm1RareNot sold
Starved ancient effigyStarved ancient effigy1Very rareNot sold
Yakamaru's helmetYakamaru's helmet1Rare[d 1][d 2]Not sold
  1. ^ Has a base drop rate of 1/300 with a threshold of 60.
  2. ^ Mod William. "Patch Notes - 20/02." 17 February 2017. Recent Game Updates Forums.


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Unique Drops

Yakamaru can only drop one item from this table. If no armour piece is dropped, the player will receive teci.

The drop rate of any piece of Achto Primeval, Tempest, or Teralith equipment is doubled if the respective non-achto equipment piece is purchased from the Goebie Armoursmith[1]. For example, buying the Teralith Helm will double the chance of getting the Achto Teralith Helm.

A player that owns all fifteen pieces of achto equipment may continue to receive achto armour as drops with the following changes to drop mechanics:

  • Achto armour doubles the chance of receiving a duplicate of that item. In other words, owning the Achto Teralith Helm will double the chance of getting another Achto Teralith Helm, and owning the non-achto Teralith Helm is no longer beneficial.
  • The drop order is no longer enforced. For example, it is possible to receive a second Achto Teralith Helm, followed by a second Achto Teralith Platebody.

Otherwise, armour is gained from Yakamaru in the following order: Gloves > Boots > Helm > Legs > Body[2]

Progressing in the drop order requires collecting all three of the previous equipment slot's achto equipment - so in order to receive an Achto Primeval robe top, they would have to get all Achto Tempest, Primeval and Teralith gloves, boots, helm and legs. The first achto equipment gained from each equipment slot is based on the combat style the player dealt the most damage with during the kill they obtained that armour.

Yakamaru's gloves drop chance is higher than Durzag's.[3]

Item Quantity Rarity GE price
TeciTeci1,000–1,750CommonNot sold
Achto Primeval MaskAchto Primeval Mask1UncommonNot sold
Achto Primeval robe topAchto Primeval robe top1UncommonNot sold
Achto Primeval robe legsAchto Primeval robe legs1UncommonNot sold
Achto Primeval GlovesAchto Primeval Gloves1UncommonNot sold
Achto Primeval BootsAchto Primeval Boots1UncommonNot sold
Achto Tempest CowlAchto Tempest Cowl1UncommonNot sold
Achto Tempest BodyAchto Tempest Body1UncommonNot sold
Achto Tempest ChapsAchto Tempest Chaps1UncommonNot sold
Achto Tempest GlovesAchto Tempest Gloves1UncommonNot sold
Achto Tempest BootsAchto Tempest Boots1UncommonNot sold
Achto Teralith HelmetAchto Teralith Helmet1UncommonNot sold
Achto Teralith CuirassAchto Teralith Cuirass1UncommonNot sold
Achto Teralith LeggingsAchto Teralith Leggings1UncommonNot sold
Achto Teralith GauntletsAchto Teralith Gauntlets1UncommonNot sold
Achto Teralith BootsAchto Teralith Boots1UncommonNot sold
Mazcab ability codexMazcab ability codex1Uncommon30,300,262



  • The feat "How to make friends and influence people" is a reference to the book How to Win Friends and Influence People.
  • The feat "Better not touch" is a reference to the lyrics of "Poison" by Alice Cooper.
  • Its purpose and name are very similar to those of the anima creatures of the eastern lands.
  • According to Mod Deg, Yakamaru was first defeated 9 hours and 20 minutes after being released.[4]
  • Prior to 8 August 2015, while in the starting pool the use of Vengeance and other sources of typeless damage could cause Yakamaru to stay in that pool, skipping the next phase.
  • The sharknado's examine text is "Chainsaws not required", which is a reference to a scene from the 2013 film of the same name.


  1. ^ Jagex. Mod Deg's Twitter account. 30 July 2015. Mod Deg: "1) Own. 2)Style only. 3) If your next drop would be X you have double chances of a drop. 4) From BM."
  2. ^ Jagex. Mod Deg's Twitter account. 30 July 2015. Mod Deg: "Mystery solved."
  3. ^ Jagex. Mod Deg's Twitter account. 3 October 2015. Mod Deg: "I never ever lie. Does your little bird?"
  4. ^ Jagex. Mod Deg's Twitter account. 13 July 2015. Mod Deg: "Nine hours and twenty minutes later, Yakamaru tastes defeat for the first time!"
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