Madness of the Rat King is an 5th edition adventure for a party of low-level characters. You can start a new adventure with Madness of the Rat King, insert it into an ongoing campaign, or run it alongside the Fiery Grog Tavern supplement!
This romp through a mad alchemist’s lair can be run from start to finish in about one or two gaming sessions. The module requires little planning beforehand aside from reading it over. Everything you need to run the game, from maps to monster stats, is contained within these pages. The adventure has enough encounters and challenges to advance the party by one level by the end of it.