Undermountain: The Endless Descent
Undermountain is hungry. Delve beneath Waterdeep, survive a dungeon that fights back, and uncover what the Mad Mage has been hiding.
$25.00
/ Session
Details
3 players following this game
Weekly / Saturday - 2:00 PM UTC
Oct 24 / Session 3
Session Duration / 3–3.5 hours
4 / 5 Seats Filled
Top Game Master
One of StartPlaying's top-rated GMs, a player favorite and highly recommended.
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About the adventure
Underneath Waterdeep, there exists the Undermountain, an immense and ever-changing dungeon filled with deadly creatures, competing factions, mysterious vaults and secrets that have lain hidden for hundreds of years. Everybody in the city has heard the tales. Few are willing to explore. This is where you come in. Noblemen, traders, scholars and more need something done in the Undermountain: a lost heir, a missing artifact, a favor owed to whatever lurks inside. They cannot, or will not, do it themselves, so they hire you to do it. Accept the missions, venture into the depths, and find out that the Mad Mage has taken note of you. This adventure presents an old-school dungeon crawl with elements of exploration, challenging combat and the eternal question: do you keep going forward, or return while there's still time? It is a hard, realistic game. Resource management is key, injuries last, and Long Rests can be made only in designated locations. Every mission is a gamble you prepare for and poor decisions can result in irreversible consequences. If you enjoy intense exploration, inventive problem solving and earned victories, this is your game. Session 0 & 1 will be free, so that you can try without worry. AI Content Disclaimer: This game may include AI-generated or AI-assisted material, such as character portraits, artwork, or other visual assets.
Game style
Combat Heavy
Dungeon Crawl
Rules as Written (RaW)
Rule of Cool (RoC)
Tactical / Crunchy
Meet the Game Master
1 year on StartPlaying
129 games hosted
Highly rated for: Creativity, Beginner Friendly, Knows the Rules
Average response time: 1 hour
Response rate: 100%
About me
Greetings adventurer, welcome to my profile. I’m Greg, though many know me as DM Fantom. Living at UTC+1 timezone and since 2020, I’ve been guiding parties through thrilling quests across West Marches servers and running classic pen-and-paper campaigns at the table. I have a passion for tactical combat, but what I enjoy most is seeing players surprise me with clever, outside-the-box solutions. If you’re looking for a game that’s lighthearted and fun, yet brimming with danger and excitement, then you’re in the right place. Are you ready to roll the dice and embark on your next great adventure?
View Profile →Character creation
Creating your character
Make a level 5 character ( 2014 rules) using the link for the D&D Beyond website. This adventure is difficult, so mechanically strong builds are encouraged since you're going to need all the help you can get. Anything that is published under the umbrella of official material by D&D but does not qualify as partner material is fair game. That is, you can use whatever is on the D&D Beyond site as long as it does not come from a third party or partner. Remember that you are going to be exploring, fighting, and problem-solving. A balanced party will have an easier time of surviving what lies beneath Waterdeep. Stats with either standard array OR point buy. Get 2 uncommon item of your liking, since you're starting at 5.
What to expect
Preparing for the session
You need to have a functioning computer and accounts on Discord and a D&DBeyond account prior to session 0. Prior to session 1, you need to have your character ready. If you need help creating a character, I am more than happy to assist you.
What Greg brings to the table
With 100+ games run on StartPlaying, my goal is to provide a polished, immersive, and well-organized experience from the moment you enter the dungeon. We’ll play using Foundry VTT, with dynamic lighting, automated mechanics, immersive effects, and high-quality battlemaps from professional third-party creators. The virtual tabletop is set up to handle the bookkeeping where possible, letting us spend more time exploring, making decisions, and playing the game. Expect tactical and challenging combat, meaningful exploration, and a dungeon that rewards preparation and creative thinking. I aim to run the rules consistently while still embracing the Rule of Cool when it makes sense. If something is unclear, we'll make a ruling and keep the adventure moving rather than getting stuck debating the rules. My priority is creating a game that feels dangerous, immersive, and fair. Your choices matter, victories are earned, and I'm here to make sure everyone at the table gets a chance to shine.
Homebrew rules
Lingering injuries on critical hits. Choice of drinking a healing potions as a bonus action or full action with different effects. Restricted long rests to safe areas.
Equipment needed to play
Internet
Computer
Microphone
Platforms used
Safety
How Greg creates a safe table
Comfort and safety for the players is essential to me. There will be a Session 0 before we begin our campaign so that we may set expectations and make sure that all participants feel safe with the themes of the game. The X-Card will be used while playing, which means that any participant can raise an issue of discomfort instantly. We will take a break, move on to a different scene, or anything else required to ensure that the table remains comfortable. I also advocate for open dialogue and aftercare sessions afterward, especially after emotionally taxing encounters. My aim is to create a game where the dungeon is brutal and unforgiving, but players never feel threatened or uncomfortable at the table.
Content warnings
Safety tools used

