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Invertebrate Oil

Invertebrate Oil
Invertebrate Oil
Rating: 2.56 / 5 — Rate it belowRating: 2.56 / 5 — Rate it belowRating: 2.56 / 5 — Rate it belowRating: 2.56 / 5 — Rate it belowRating: 2.56 / 5 — Rate it belowRating: 2.56 / 5 — Rate it below
2.56 54 votes
Rating: 3.44 / 5 — Rate it belowRating: 3.44 / 5 — Rate it belowRating: 3.44 / 5 — Rate it belowRating: 3.44 / 5 — Rate it belowRating: 3.44 / 5 — Rate it belowRating: 3.44 / 5 — Rate it below
3.44 26 votes

Drop: Oily Invertebrate [61]

Zone: Maldraxxus

Approximate Drop Rate: Unknown

Invertebrate Oil
Invertebrate Oil
Binds when picked up
Use: Teaches you how to summon this companion.
Want it Want it | Got it | Exclude — Community: 0.7% have it
Neutral Neutral
Bubbles and idles about.
Vocalizations (on-click)
Occasionally spews liquid onto the player, applying a temporary "Covered in Oil" buff which turns the player yellow-orange.
3 allowed
Patch 9.0.2 | Posted: October 13, 2020
To spawn the rare that has a chance of dropping this pet, players must interact with the Pool of Mixed Monstrosities located South of Plague Watch Flight Master in Maldraxxus.

Defeated slime mobs nearby will drop an object that can be interacted with and carried to the pool. Adding 10 of each colored item, Viscous Oil (red), Miscible Ooze (yellow), and Mephitic Goo (blue), will summon the rare creature that can be looted once per day per character.
Level 0: Health 0Power 0Speed 0
Requires Pet Level: 1

100% Hit Chance 


Leave a slime trail, dealing 354 Critter damage and coating the target in sticky goo, making it impossible to flee for 1 rounds.

Vs. Undead

Vs. Humanoid
1 Round Cooldown
Requires Pet Level: 10

100% Hit Chance 


Oozes onto the enemy, dealing 492 Undead damage.

Vs. Humanoid

Vs. Aquatic
3 Round Cooldown
Requires Pet Level: 2

100% Hit Chance 


Consumes an allied corpse to restore 50% of total health.


Corpses can only be used once.

1 Round Cooldown
Requires Pet Level: 15

100% Hit Chance 


Deals 295 Beast damage.

If the user kills an enemy with Devour, they restore 591 health.


Devour continues for 2 rounds.

Vs. Critter

Vs. Flying
3 Round Cooldown
Requires Pet Level: 4

100% Hit Chance 


Rots the target's flesh, dealing 492 Undead damage and transforming them into Undead for 5 rounds.

Vs. Humanoid

Vs. Aquatic
5 Round Cooldown
Requires Pet Level: 20

100% Hit Chance 


Submerges into a puddle of ooze, becoming unattackable for one round.


On the next round, you attack, dealing 788 Magic damage.

Vs. Flying

Vs. Mechanical


Magic pets cannot be dealt more than 35% of their maximum health in one attack.


Damage Taken 

50% from Dragonkin abilities

33% from Aquatic abilities

1-4 of 4
Rating: 0   [Report]

This pet has a variation. Two different skins.


I just summoned mine and I noticed it is pretty large for a slime (awesome), and it has bones floating in it. All the other versions I have seen online or on the AH are just plain yellow with a face. Can anyone confirm how rare it is to get the one with bones in it?


The Invertebrate Oil is already the crown jewel in any slime collector's pet collection(along with Living Fluid and Filthy Slime), but getting the version with bones in it.....sweet!

Jan 14, 2023 at 2:15pm | Edits: 5 | Undermine-us | Pets: 1230 Compare collections | Score: 8555
Rating: 0   [Report]

Been farming that rare all expansion so far and just today I got it. It's such a pain to even spawn that rare, yellow is extremely hard to find and is best to be done in a group.


If you want the pet for your collection, find a group and good luck. If you want it just because it is a slime and you don't care for the colour, there are a dozen or more slime pets you can get so much easier, like for 10g or less on the AH, don't waste your time if you just want any old slime pet.

May 2, 2021 at 4:00am | Edits: 0 | Barthilas-us | Pets: 985 Compare collections | Score: 5668
Site MVPWain 
Rating: +1   [Report]

To spawn the Oily Invertebrate, which has a low chance of dropping this pet, you must add exactly 10 each of red, blue & yellow oozes (looted from slimy NPCs of the same colours) to the Pool of Mixed Monstrosities in Maldraxxus. Because of the precise requirement, it's the most easy for a random player to mess it up.




- Consider creating a group to speed it up.

- Leave red for last: red is the most common and random players are more likely to add too many.

- Yellows are mostly found north of the pool, while reds and blues are south, and most players will go south to look for oozes. So it's usually best to do yellow first. BUT: occasionally yellow slimes will also spawn to the south. If so, be careful about adding a lot of yellows too early as it's more likely a random player will add too many.

- Sometimes blues can only be found much further to the south.

- Consider initially adding only 9/10 of each colour and leave the tenth of each for the end, in case someone over-adds.

Mar 8, 2021 at 1:00am | Edits: 2 | Aman'Thul-us | Pets: 1686 Compare collections | Score: 13479
Rating: 0   [Report]

Cross Gazer and Willy are currently the only other pets with both Rot and a Critter attack to capitalize on the type conversion.


However, this one is an extreme pain to get. Not only is it a low drop chance off of a named that takes a lot of time investment to spawn, but the event that triggers it can be influenced by any player in the open world resulting in one of the other six named being triggered instead. Then you have to start over from scratch and try again and pray.

Jan 9, 2021 at 12:00am | Edits: 0 | Thunderhorn-us | Pets: 0 Compare collections | Score: 0
1-4 of 4

Is the ooze holding the bones in, or are the bones holding the ooze together?
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