Publisher's blurb: Sanctum of the Matterites is a Dungeons & Dragons adventure using the 5th Edition rules. It is designed to be played by a party of adventurers at any level. This adventure can be treated as a one-shot campaign lasting up to 4 hours, incorporated into a larger adventure as a sidequest, or expanded and extended into a fully-formed campaign. The Matterites are a group that history has all but forgotten. A few scraps of research collected in measly tomes across the world ellude to an ancient place of Elemental power. Few alive have read this work and even less believe what they have observed. Yet the location is very real, and the Sanctum is waiting for a brave adventuring party to take on the elemental challenges within. This guide features a low-combat adventure. There are numerous puzzles that the players must overcome with logic and ingenuity. For the players, they may try to use skills and spells to pass each trial, but this is really a game of puzzle solving. Think of it like an escape room but with the risk of an elemental demise. For the DM, running this adventure is very straightforward. For the most part, the DM only needs to roll a d10 for most of the puzzles. The single monster stat block required to run this adventure, is detailed at the back of the guide, and scaled for higher level parties.