Kosumoth the Hungering is a Secret NPC that you can unlock by solving the mystery of the "whispers" that plague the old warlock Drak'thul. Kosumoth the Hungering is one of the major secrets added in Legion, along with Lucid Nightmare, Riddler's Mind-Worm, Sun Darter Hatchling and Uuna.

For this secret you will have to find hidden orbs scattered across the Broken Isles. At the end of the secret you will unlock a world quest to defeat Kosumoth the Hungering which will either reward the Fathom Dweller mount or the Hungering Claw pet.

Drak'thul

Go to the Broken Shore and speak with Drak'thul. After a conversation about demons, he will tell you to go away.

/way #646 37.2 71.8 Drak'thul

Weathered Relic

Go to coordinates 58.5 54 and enter the Feldust Cavern. At the end of it you will find a mound of dirt on the ground, click it to get the Weathered Relic.

/way #646 58.5 54 Feldust Cavern

Return to Drak'thul and ask him about the relic. Continue to speak with him a few times until there are no more dialogue options.

Progress Macro

Use the following script to track your progress:

/run local a={43730,43731,43732,43733,43734,43735,43736,43737,43760,43761}for i,q in ipairs(a)do print(format("Orb %s: %s",i, C_QuestLog.IsQuestFlaggedCompleted(q) and "\124cFF00FF00Done\124r" or "\124cFFFF0000Not Done\124r")) end

Hungering Orbs

The next step involves finding secret orbs hidden around the Broken Isles, many of which are hidden in caves beneath shrubbery and trees, or even underwater!

Orb 1

The first orb can be found in Azsuna, in a cave hidden under some shrubbery near the trees.

/way #630 38 37 Orb 1

Orb 2

The second orb can be found in Stormheim, in a cave hidden behind a tree. There is a ghost in this cave who can easily two shot a low level character. You can use any form of Crowd Control on this enemy in order to access the orb behind him.

/way #634 33 76 Orb 2

Orb 3

The third orb can be found in Val'sharah, in a cave hidden under the shrubbery. Note that in this cave there is a hostile elemental which can be easily killed.

/way #641 41 81 Orb 3

Orb 4

The fourth orb can be found in The Broken Shore, in an underwater cave hidden between rocks. Note that there are geysers in this cave which can do a lot of damage to a low level character.

/way #646 29 79 Orb 4

Orb 5

The fifth orb can be found in Azsuna, a cave hidden between crystals. You can see the brown hues of the cave among them.

/way #630 59 13 Orb 5

Orb 6

The sixth orb can be found north-east of the Broken Isles, in an underwater cave located north of Shield's Rest in Stormheim. To enter the cave you have to go below the Toothless Great White. Note that there are geysers in this cave which will do a lot of damage to a low level character.

/way #619 67.3 14.8 Orb 6

Orb 7

The seventh orb can be found in Highmountain, in a cave behind bushes. Note that there is another cave there to the left, but that's not the cave that you're looking for.

/way #650 55.8 38.5 Orb 7

Orb 8

The eighth orb can be found in Azsuna, in a cave hidden behind shrubbery. The orb is also hidden under a shrub.

/way #630 54 26 Orb 8

Orb 9

The ninth orb can be found in Eye of Azshara, in a hidden cave found in a shipwreck. This shipwreck is a bit tricky to navigate so we recommend you get an item that gives you underwater breathing.

Enter the shipwreck from the bottom, navigate towards the top of the ship and then go through the small entrances. At the end of the ship, swim down and on the left you'll find some kelps. Enter the cave behind those kelps. The orb is located on the right side of this cave, between several stalagmites.

/way #790 79.5 89.3 Orb 9

Orb 10

The tenth orb can be found on the Broken Shore, right behind Drak'thul.

/way #646 37.2 71.8 Orb 10

Speak with Drak'thul, he will laugh and thank you for freeing him from the whispers.

Now you have got yourself attuned to the Void (Void Attunement) and have unlocked the world quest DANGER: Kosumoth the Hungering!

Realm First

The first player who unlocked Kosumoth on their realm also triggered a one-time server-wide message.

World Quest

The World Quest to defeat Kosumoth the Hungering resets every two weeks, and rewards either the Fathom Dweller mount or the Hungering Claw battle pet.

Note that the Hungering Claw battle pet is usually the reward for completing the world quest DANGER: Kosumoth the Hungering. It can take even 6 months or more for the Fathom Dweller mount to show up as a reward.

The Fathom Dweller mount.

The Hungering Claw battle pet.