Radiant Citadel map and the Auroral Diamond, in the D&D multiverse
The Radiant Citadel

Our fine DungeonSports Coliseum exists in the Astral Plane, floating through wildspace. We are reachable via planar portals, Spelljammers, and a few public toilet stalls across the D&D multiverse. Our patrons and monsters come from a broad range of domains from across that multiverse. I’d like to introduce you to a few key locations across the planes of existence, and give you an idea of how all the various worlds interconnect.

Forgotten Realms

The Forgotten Realms are one of the most well documented regions of the multiverse. The Sword Coast Adventurer’s Guide fills in general information on a lot of locations in Faerûn. We know of the adventures and misadventures of many different heroes and villains up and down the coast of this land. I’ll break them down by region below.


One of the foremost cities of the Sword Coast, Waterdeep serves as the backdrop for a number of adventures. Tales from the Yawning Portal introduces us to the eponymous inn and tavern, although the adventures therein span the continent from Oakhurst in the North, to Tamoachan in the south. This inn is also the place adventurers will meet to begin their journey in Waterdeep: Dragon Heist. The yawning portal itself serves as access to the Undermountain. In the immense caverns of the undermountain, adventurers will explore Halaster’s mega-dungeon in Waterdeep: Dungeon of the Mad Mage.

The seedier side of the City of Splendors has it’s uses too. Items from across the realm have crossed the table of one beholder or another named Xanathar. He catalogued these items in the text Xanathar’s Guide to Everything.

Candlekeep Mysteries

The foremost repository of magical information on the Sword Coast, Candlekeep is a fantastic hub for adventurers as well. The adventures contained in this tome take place both in and outside of the keep’s walls. I wouldn’t be surprised if you could find your way down to the Chamber of Lost Lore and get some ghost to whisper to you the secret of finding your way to the Coliseum.


Barovia currently exists in a demplane, and as such may be accessible from many locations. However, it is primarily associated with Daggerford in Faerûn. As such, the Arena Gnomes advised that I included it in this section. The adventure Curse of Strahd takes place in Barovia. Barovia is a Domain of Dread. These are regions pulled out of their original realities by the dark machinations of the Dark Lord who rules them. A brief perusal of Van Richten’s Guide to Ravenloft will give you a peek at many other Domains.

Other Faerûn Adventures

Many other adventures take place on and off of the Prime Material Plane of Faerûn. It’s not uncommon to see notable beasts and beings from these locations in the Coliseum.


Eberron: Rising from the Last War introduces us to a land with a bit of a steam-punk feel. This is a land notable for magical technology, the warforged machine-people, and some really nasty fiends. Sul Katesh is a good friend of mine. She comes over for tea sometimes. I have asked her many times not to unleash an arcane cataclysm before the team comes. She isn’t the most compliant of guests, and usually ruins the tea. Still, good times!


Mechanus, home of the modrones, Sigil and the Outlands…Our Teleportarium Gnomes hope they will be able to forge links to all of these locations in the near future. Probably within the next year. This is a very exciting addition to the D&D multiverse.


Tales are told of a great sage named Matthew Mercer, who brought us stories of the land of Exandria in the books Explorer’s Guide to Wildemount and Critical Role: Call of the Netherdeep. Everbody loves these “moorbounder” things that are like black sabertooth tigers, but with goat eyes. I’m gonna be honest: they give me the willies…and not the good kind of willies.

The Planes of Magic The Gathering

Who doesn’t love a good crossover? If you want to get some MtG in your DND, you’ve got that option. You can tour the ecumenopolis and get in with the guilds, the Guildmasters’ Guide to Ravnica can get you there. Maybe you need some gods to worship, and have a strong preference for wearing togas? Mythic Odysseys of Theros can get you there. Strixhaven: Curriculum of Chaos can give you a somewhat less problematic and more inclusive way to attend magic school.

You can also get a taste of a few other MtG worlds in the Plane Shift Series:


Krynn is a world constantly riven by strife. The Dragon Queen Takhsis and her armies make their first appearance in Dragonlance: Shadow of the Dragon Queen. Of course, you’re going to need a lot of dragons for your dragon war. Famous forgetful wizard of Krynn penned Fizban’s Treasury of Dragons to satisfy those needs.

Ethereal Plane

The radiant citadel floats through the ethereal plane, spiraled around the Auroral Diamond. The citadel is an amazingly vital place, with a very diverse set of denizens. We’d love to have more experience with the locals, but they are still relatively unknown to us. Journeys through the Radiant Citadel give us just a tiny peek into the wonders of this place. It is truly a gem of the D&D multiverse.


We got our first look at Grayhawk Ghosts of Saltmarsh. We also got more rules about ship-to-ship combat for oceangoing vessels. Although not as well known the Tasha of Tasha’s Cauldron of Everything is also a denizen of Grayhawk.

Out in the Multiverse

Of course, strapping a spelljamming helm to some boat you find is probably the best way to get out into the universe. Spelljammer: Adventures in Space is your key to adventures out in Wildspace, as well as finding your way to new planes of existence. You’ll want to take a look at Mordenkainen Presents: Monsters of the Multiverse so you’ll know what to expect out there. We also recommend you take a look at franchising with Acquisitions Incorporated. It’s good to have a strong organization at your back when you move into new territory.

Before you go, take a look at the DungeonMart to get an idea how much the strange artifacts you come across are worth.

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