This Unearthed Arcana features new playtest content drawn from the Underdark. It continues the theme of the previous Underdark Options UA, presenting subclasses and species native to the deep places beneath the world.
The material in this UA uses the rules in the Player’s Handbook. Read about this playtest directly from the D&D Game Design Team below.
- Underdark Option Highlights
- Freedom Domain
- Circle of Spores
- Faerzress Sorcery
- Deep Imaskari
- Drider
- Illithidkin
- Kuo-toa
- Myconid
From the Game Design Team
The material in this Unearthed Arcana includes more material inspired by the Underdark, one of D&D’s most storied locations.
Like our last Unearthed Arcana, the material here touches on elements of the Underdark that have appeared previously, but which have been expanded or transformed in ways we’re not yet ready to fully reveal. Faerzress, for example, has been part of the Underdark since D1 Descent into the Depths of the Earth, and the Deep Imaskari have made their home in the deepest depths of the Lowerdark since 2003’s Underdark. More about these topics will be revealed… in time.
Right now, however, we need your help. Try these new subclasses and species out for yourself, fill out the survey that will follow, and help us make these character options fun at your table.
—Jason Tondro, Senior Game Designer
Underdark Option Highlights
This UA contains subclasses and species that might be included in a future product. Most of these subclasses and species are entirely new and have not appeared in UA before. The Circle of Spores Druid, however, is an update from a previous version that appeared in Tasha’s Cauldron of Everything.
Subclasses
This Unearthed Arcana features three new subclasses:
- Freedom Domain
- Circle of Spores
- Faerzress Sorcery
The following sections summarize each subclass and discuss some of their underlying mechanics.
Freedom Domain
The concept behind the Freedom Domain is simple: this subclass is a high-Dexterity Cleric. Some of the mechanical design of the class was borrowed from the high-Dexterity Oath of the Noble Genies Paladin designed for Forgotten Realms: Heroes of Faerûn. Previous editions—such as D&D 3e’s Freedom Domain—also had an influence on this subclass.
The spell list was designed with one question in mind: Would this spell help in a jailbreak? When the answer was yes, we tried to include that spell on the list.
We wanted the Freedom Domain’s Channel Divinity to be a low-level Freedom of Movement effect, but it was also important that this Channel Divinity be useful most of the time, even when none of the Cleric’s allies are Grappled or otherwise restricted. Design review and iteration on the design added a movement buff, ensuring that Channel Divinity is always useful.
Circle of Spores
This subclass originally appeared in Guildmaster’s Guide to Ravnica and was updated in Tasha’s Cauldron of Everything for use in the broader D&D multiverse. We have updated it now for 5.5e.
In an Underdark setting, the ability to use spores to reanimate corpses is most commonly associated with myconid sovereigns—and it’s possible your Druid learned this art from one such creature! Some flavor elements have been reworked for the Underdark setting to reflect this connection. These Druids also get Telepathy as part of this subclass, further tying it to myconids.
The “Design Notes” sidebar in the UA explains the major changes we made to this class, so we won’t discuss them here, but can expand on the choice to replace Spreading Spores. Spreading Spores, which allowed you to create a cloud of spores up to 30 feet away from you, felt like it didn’t fit with the “get into melee and raise the dead” loop of the subclass. We hope Explosive Burst encourages Druids to keep themselves and their zombies in the fray!
Faerzress Sorcery
Faerzress, the strange radiation of the Underdark, mutates creatures exposed to it for long periods. This makes it a natural power source for Underdark Sorcerers. Faerzress also has a list of distinctive magical effects: blocking teleportation and scrying, enhancing Darkvision, granting mundane weapons magical properties, and more.
The challenge for this subclass was designing cool Sorcerer abilities with a faerzress vibe, starting with the ability to create faerzress and be not just immune to the radiation’s effects but empowered by it. Adding scrying and terrain-manipulation to the spell list gave the Faerzress Sorcerer interesting options not usually available to the class. Other Sorcerer subclasses are often associated with a particular kind of damage (such as Radiant and Fire for Spellfire Sorcery); for faerzress we leaned into Lightning damage, culminating in the ability to transform into a being of pure faerzress energy.
Species

This UA also contains five new species. While many Underdark adventures focus on characters from “upstairs” traveling downwards, we wanted to provide more ways for players to explore characters who already live in the Underdark and who are fighting to protect their home. You can already play a Drow, Duergar, or Deep Gnome, but now we’re adding the following:
- Deep Imaskari
- Drider
- Illithidkin
- Kuo-toa
- Myconid
Deep Imaskari
We discussed the Deep Imaskari and their relationship to Unlight in the previous UA, so make sure you check that out! The Deep Imaskari are descended from humans, so some features (such as Resourceful) reflect this.
Most features, however, focus on their connection to Unlight. While most Underdark species have Darkvision or some other means of seeing in the dark, the Deep Imaskari instead create light wherever they go.
Drider
There are two parts to the Underdark expression of the Drider fantasy: the spider and the drow, who combine seamlessly into one deadly hunter. This drider’s abilities allow them to lure in and trap their prey. How they finish it off is dependent upon the rest of the character build.
Driders are a staple of the Underdark, but they’re a tough concept to bring to the player-facing side of the game due to their typical size and many legs. We took inspiration from the Centaur in Mordenkainen Presents: Monsters of the Multiverse for the mechanical expression of this concept.
Illithidkin
An Illithidkin is a victim (or willing participant) of mind flayer experimentation. They have access to a small selection of psionic abilities. This contrasts with our Ceremorphosis feat path from the previous UA, which requires more build investment and provides the full mind flayer experience. This species and that feat path weren’t designed to be used together, but rather represent two different ways one might run afoul of mind flayer activity.
Kuo-toa
One aspect of the kuo-toa that has captured our imagination is their relationship to their gods. They create idols out of disparate pieces (statues, body parts, household objects, etc), and sometimes those idols come to life. If you play as a kuo-toa, you’ll get access to the Find Familiar spell, but you can mix and match features of the available familiars to create your own delightful abomination!
Myconid
Like their fungal inspiration, myconids come in all shapes, sizes, and colors. They have appeared in many D&D adventures (including Baldur’s Gate 3), and we thought it would be fun to imagine myconid adventurers. What does it look like for a plant to uproot and embark on a journey?
When a myconid leaves their circle for adventure, their party becomes their new circle! Myconid abilities are all about building rapport with your team and sharing knowledge, often without needing to exchange even a word. Because of that, this species is a real “team player.”
Your Feedback Matters
We’re really looking forward to your thoughts and comments on the subclasses and feats in this UA. Once you’ve read or played with these playtest materials, be sure to fill out the survey on D&D Beyond, coming on September 17, and let us know what you think.
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Posted Sep 10, 2026Drider should stay as "monsters" or at the most NPC's. I agree with other commenters that there should be an update for Duergar and Deep Gnomes.
I would also love it if the old practice of releasing the UA on the site so we can play test it using the official toolset of D&D.
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Posted Sep 10, 2026Make the Drider a large creature you cowards!
Feature:
Disproportionate body: For the purpose of determening wieldable equipment your size counts as medium.
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Posted Sep 10, 2026Yay I can finally be a mushroom boi
also the other species are very cool and I really like the subclasses
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Posted Sep 10, 2026I don't care if the Illithidkin race and the Path of Ceremorphosis feats weren't supposed to be used together I still will be 🫠
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Posted Sep 10, 2026I'm wondering if this has anything to do with the recent business association with the esteemed Kobold Press and their "Underworld: Sunless Depths" just hitting Kickstarter. I'll just say I see similarities.
I do like this, though.
The drider feels like a weird inclusion, as they were originally punished and tormented male drow who offended Lolth. I could see it making an interesting character, though.
The Kuo-toa, though.... that could be fun. Definitely should be a warlock, with a patron of their own creation. It seems like an obvious but potentially excellent storytelling idea is one who's village was destroyed, and they are one of the few survivors. Go vestige patron warlock, make the vestige just weird as hell (an albatross with a barracuda head and starfish for feet), and it's the remnant of the destroyed village's god.
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Posted Sep 11, 2026Regarding the cleric, you can select Protector at level 1 to use martial weapons and heavy armor. Also, the Channel Divinity breaking allies free from a restraint of some sort is useful into high tier play where there can be bigger and bigger consequences for being grappled but using your action to break free can feel bad due to not attacking. Also, whatever supplement they make for the Underdark will almost guaranteed have tons of movement limiters in the environment as well as as part of monster features.
For the Druid, I would remove the Reaction from Halo of Spores and just have it hit any creature you choose who enters or starts their turn there once per round. For the zombies, I agree. Make it last all day and let them carry a smaller version of Halo of Spores that is still tied to once per round from the character. As for the level 10 feature, it can be forced to trigger using the level 6 feature's Bonus Action. However, I think if you force it to trigger, you should gain a new zombie up to replacing the ones from the Level 6 feature being replaced if they kill creatures as a result.
For the sorcerer, the distance for the teleport restriction needs to be made to restrict all teleportation. 1 mile is insane and practically speaking makes it a useless feature. I don't even need to teleport half a mile to effectively escape an encounter and most useful teleports to block only have a range of 30-60 feet. I would put Faerzress Zone at level 14 and give it the effects of the level 14 Faerzress Spell feature costing 3 sorcery points and put the Faerzress Spell feature at level 3 but leave it as is costing 1 Sorcery point.
The species: Just... amazing! I want more of this so much!
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Posted Sep 11, 2026WIZARDS PLEASE do not limit the Spore’s Druid 1d6 Necrotic damage on melee attacks to only ONCE PER TURN I am BEGGING ON BENDED KNEE it’s the only redeeming feature of the subclass! It is not broken to add the damage to all attacks made druids don’t even get extra attack!
thank you
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Posted Sep 11, 2026I agree with the zombie stats being nearly worthless, but giving them some of your Temp HP doesn't impact your fungal wildshape. The 5e version depended upon you keeping your THP to maintain your fungal state. This new UA version does not drop if you lose your temp HP.
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Posted Sep 11, 2026Duergar and svifneblin seems like the most logical step before Iilithidkin and driders...which is just a straight up monster species.
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Posted Sep 11, 2026this is great I can’t wait for an underdark book the ones from 3rd edition were so ******* cool
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Posted Sep 11, 2026Stripping the wild magic surge effect from the Faerzress was a mistake. Put that back. Being able to be the only caster within 120ft able to cast without danger would be awesome and not necessarily overpowered because of the low chance of it triggering. If anything, increase that chance just a bit. 1-3 on a d20.
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Posted Sep 11, 2026I really like the third edition underdark book. I hope you can make this book as the old one and that’s a tall order. The changes to spore Druid aren’t popular with my group. The mushroom race is pretty cool. Would love to see gloamings again deep imaskari are neat kinda like the new direction. I don’t care for the sorcerer subclass I would have liked it to be spider themed. The ilithlid race is cool and I don’t care about the frog guys. Overall I do like the direction you guys are going thanks for allowing us to chip in
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Posted Sep 11, 2026It is deeply important to me personally that Kuo-Toa are Aberrations and not Humanoids.
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Posted Sep 11, 2026It looks more and more like the design team mandate is "play it so safe that nothing interesting gets created." They've managed to achieve that so far. The Freedom domain is interesting as a concept, but the abilities are so reactive/passive that it doesn't seem like it would actually be fun to play. After playing a Spores druid in BG3 that was fun, powerful, and versatile, this version feels like a huge step down. The sorcerer subclass is barely worth the time to read through.
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Posted Sep 11, 2026I love driders already so it was really nice to see them here, and Deep Imaskri are really cool, I didn't expect to like them so much. Also a dex based cleric seems really fun, but the radiation sorcerer was kinda underwhelming and until like the last couple abilities felt really situational