NeutralPlague Deviser Marileth
Image of Plague Deviser Marileth
Gender Male
Race Maldraxxi necromancer (Humanoid)
Level 52-54
Resource Mana
Reaction Alliance Horde
Affiliation(s) House of Plagues, Undying Army
Location Blighted Scar and House of Plagues, Maldraxxus; Seat of the Primus
Status Active
Companion(s) Margrave Stradama (soulbind)[1]
Bloop, Kevin, Melvin, Ooz, Plaguey (slime companions)

Plague Deviser Marileth is a prominent necromancer of the House of Plagues. He was a close confidant of Margrave Stradama but was driven insane by the fallout of his house's destruction and mistakenly believes adventurers to be his apprentice.

Marileth serves as a quest giver in the Maldraxxus storyline and is one of the soulbinds available to adventurers of the Necrolord Covenant.


Marileth has known many soulbinds, but the foremost of them all was Margrave Stradama herself.[1] After the Primus's disappearance and the beginning of the anima drought, the latter of which caused the House of Plagues' work to stagnate, Stradama confided her fears in Marileth. The House of Rituals offered to provide the House of Plagues with anima and sent the necromancer Korrim the Cunning to assist in their experiments. Stradama and Marileth both suspected duplicity, but their house was in no position to refuse. As a last resort, Marileth devised a potion to protect his margrave if the need arose. Before he could craft it, however, the House of Plagues was annihilated. The disaster caused Marileth to lose his mind, but he held onto his mission of crafting the potion for his margrave.[2][3]

When Baroness Draka sent a Maw Walker to search for survivors from the House of Plagues, they found Marileth at his camp in the Blighted Scar. He mistook the outsider for his apprentice and enlisted them to help him finish his potion, as well as create a slime companion of their own.[4][5] Marileth then relocated to his laboratory near Plague Watch, where he and his "pupil" worked together to concoct the potion. Margrave Stradama—now driven mad and transformed into a monstrous slime being—appeared shortly after, but the potion succeeded in granting her and Marileth a brief moment of lucidity. Marileth was shocked at Stradama's fate, but the margrave told her "dear Marileth" that he had to forgive himself and that while she was lost, he had to endure. The margrave disappeared and Marileth promised that he would endure for her sake. Moments later, the effects of the potion wore off and he returned to his mad state, but the act of temporarily clearing Stradama and Marileth's minds awakened the Rune of Insight on the Blade of the Primus carried by the Maw Walker. Marileth also mentioned "feeling strange", suggesting that, on some level, he retained the memories of the encounter.[6] Upon spotting his "apprentice" again, Marileth agreed to help them with their own "project"—unlocking the Seat of the Primus.[7]

Along with his pet slimes Kevin and Plaguey, Marileth helped defend the Seat when it was attacked by the forces of Baron Vyraz.[8] After the Seat was opened, he relocated inside with his slimes and allowed Koa and Kou—two stewards rescued from the House of Constructs by the Maw Walker—to ride around on Plaguey and Bloop.[9]

In the Covenant Sanctum version of the Seat of the Primus, Marileth and his slimes can be found in the laboratory in the northwestern part of the fortress. The plague deviser volunteered to teach Maw Walkers who joined the Necrolord Covenant about the process of soulbinding[10] by binding his soul to theirs.[1] Marileth and Bonesmith Heirmir later helped defend the Seat by equipping Ragewing with a few "surprises" (plague vials and runed spears) which Maw Walkers could throw at the traitorous necrolord forces besieging the Seat.[11] Marileth and Kevin partook in the joint kyrian and necrolord assault on the House of Constructs, accompanying Alexandros Mograine's forces at the Stitchyard.[12]

Marileth participated in the Battle of Ardenweald, riding into battle on a trained flayedwing. He considered Ardenweald to be beautiful, but commented that it was suffering from a dire lack of slime. To rectify this, he and the Maw Walkers cleared the skies above the forest by throwing large amounts of slime at the winged Mawsworn.[13] The plague deviser and Kevin later also joined the united covenant assault on Desmotaeron[14] before returning to the Seat to witness Draka's promotion to margrave.[15]


Marileth and Kevin defending the Seat of the Primus.

Maldraxxus storyline
  1. N [53] The House of Plagues Activequest
  2. N [53] Bug Bites & N [53] Spores Galore AvailablequestActivequest
  3. N [53] Slime, Anyone? AvailablequestActivequest
  4. N [53] Hazardous Waste Collection & N [53] Plague is Thicker Than Water AvailablequestActivequest & N [53] Applied Science Activequest
  5. N [53] By Any Other Name AvailablequestActivequest
  6. N [53] Fit For a Margrave AvailablequestActivequest
  7. N [53] Fathomless Power AvailablequestActivequest
Necrolords Campaign
  1. N [60] Collective Soul Activequest
  2. N [60] Come On, We're Simpatico! AvailablequestActivequest
  3. N [60] A Journey Made Together AvailablequestActivequest
  4. N [60] Conduits, What Are They For? AvailablequestActivequest
  5. N [60] No Rest For the Dead Availablequest



Marileth and his slimes inside the Seat of the Primus.

Maldraxxus storyline
Main article: The House of Plagues#Notes
Main article: Slime, Anyone?#Notes
Main article: Hazardous Waste Collection#Notes
Main article: Applied Science#Notes
Main article: By Any Other Name#Notes
Main article: Fit For a Margrave#Notes
Main article: Fathomless Power#Notes
Main article: Among the Chosen#Notes
Necrolords Campaign
Main article: Come On, We're Simpatico!#Notes
Main article: Enemy at the Door#Notes
Chains of Domination campaign
Main article: The Battle of Ardenweald#Notes
On approach in the Seat of the Primus if part of the Necrolord Covenant
Ah, my apprentice! You return at last!
On approach in Plague Watch if part of the Venthyr Covenant and are not a Friend or higher
Is that the sound of a naive apprentice approaching that I hear?
On approach in the Plague Watch if part of the Venthyr Covenant and are a Friend or higher
Be careful not to step in my latest experiment, <name>. I'd hate to lose you.
On approach in the Plague Watch if part of the Venthyr Covenant and are a Best Friend
It's <name>! Kevin, put away the experimental potion... for now.


  • Any new ideas for a plague?
  • Do you... hear them? The voices?
  • Good to see you, my apprentice!
  • I always have time for my brightest pupil!
  • Shall we get to work?
  • What have you created today?
  • With the margrave's help, anything is possible!
  • Oh, was there something else you needed, apprentice? Some additional instruction? A new test subject? All you need to do is ask!
  • Enjoy your field research!
  • Farewell, apprentice.
  • Hm, am I forgetting something?
  • Keep an open mind!
  • Study hard.
  • Thank you again for all of your help!
  • Why do I feel... hollow?


Blighted Scar
My apprentice! You return!
Gossip Your "apprentice"? What are you talking about?
Now, my apprentice, there is no need for humility. You must have more confidence in yourself!
You are my brightest, most devoted student. I would be remiss not to cultivate such talent with individual instruction!
I was just wondering where you had gone. We still need to complete our potion for Margrave Stradama! She'll surely be eager to see your progress.
Gossip Your potion turned the Lich champion into a slime! (becomes available after completing N [53] Side Effects)
I don't know what you expected.
You asked for a potion of ultimate power--what is more powerful than a slime?!
Slimes have no nervous system to feel pain, no muscles to ache or atrophy, no heart to break at the loss of your House and friends...
And sometimes, they're corrosive! Most powerful, indeed!
Seat of the Primus after N [54] The Door to the Unknown
My apprentice! So good to see you. I owe you thanks for your assistance with my field research today!
I can't place it, but something feels different now... it's as if a great weight has been lifted from the shoulders of Maldraxxus.
Perhaps I'm simply happy that our visitors from Bastion have befriended the dear slimes!
Though I can't recall which slimes were corrosive... Hm.
Perdition Hold, Necrolord Assaults
My apprentice! You return!
Gossip Your "apprentice"? What are you talking about?
<Name>, I was wondering where you had gone!
There's no need for embarrassment. I know you have been remiss in your studies, but you are here now! Let's get right back to work!
In Plague Watch if part of the Venthyr Covenant and are not a Friend or higher
Your career trajectory troubles me, <name>.
I have never had a former apprentice of mine go on to host courts. Most irregular...
Kevin seems taken with the idea, however, so I guess I won't stand in the way of progress.
When is the next Ember Court, by the way?
In Plague Watch if part of the Venthyr Covenant and are a Friend or higher
There's my favorite former-apprentice-turned-court-host!
I have been dying to share a few ideas I had for the next Ember Court.
Fair warning: they all involve excessive amounts of slime.
Some of the slimes, however, are also delicious!
In Plague Watch if part of the Venthyr Covenant and are a Best Friend
We are best friends now, <name>. Right?
So how many more times must I beg you to smuggle some of your covenant's dredgers to me here in Maldraxxus?
Sure, I've managed to liquefy a few at the court when you aren't looking, but imagine the experiments I could conduct on them here with access to my entire lab.
I could finally answer the question that is on everyone's mind: are dredgers made of slime?
It certainly seems possible!
At the Ember Court
What a wonderful day for court!
I brought Kevin, of course. Along with two other tasty treats I cooked up just for the occasion!
Oh, don't worry. They're still slimes. Everything's slimes.
<Marileth looks around.>
Speaking of which... I'm told that your dredgers are made of muck.
Muck... muck...
Do you think that's slime-adjacent?
I'd better find out!
If the player uses the  [Quill of Correspondence], he responds with a Letter
Main article: Quill of Correspondence


  • The drink  [Bloody Marileth] is named after the plague deviser.
  • Marileth may have been named after the Marilith from Dungeons and Dragons, a race of demons that inhabit the Abyss, one of the afterlives of D&D.

Patch changes

See also


External links

NPC Ember Court faction