This young organization has its headquarters in the inhospitable plane of Pandemonium. The berks that join this bizarre club are people who like climbing down into caverns with stalactites, stalagmites and the narrower the cavern the better.
With such a barmy hobby where else could be this Guild be located? The headquarters have several rooms for the members and will accept guests if they agree to make a trip with one of the members as a bodyguard, Pandemonium isn't the friendliest place in the multiverse.
The chief of the Guild is Mark Oswald (Pr/male human/Cleric (Ibrandul) 9/N; madness: climbs every surface on sight). He is fond of caverns and dark places and really enjoys going where most people fear and to say something in his favor, he has visited most of this plane and is still alive. To be admitted in the Guild the future member has to follow him and try to climb following his pace. Of course, Pandesmos isn't the best place to make a challenge of climbing with its barmy gravity, therefor he takes everyone to Phlegethon.
The main service that is achievable in the Guild, is information or support in expeditions involving a cavern. They have traveled to lots of caverns and tunnels in the first three layers of Pandemonium and many other places in some other planes (such as Earth, Gehenna, mount Olympus or some Prime worlds). They can give a lot of advice of what is to be found there.
