Threshold magazine is a fan magazine dedicated to continuing adventures in the Mystara setting. Issue 4 has just been released, and like the other issues is over 200 pages in length. For those who continue to adventure in the world of Mystara, it’s a valuable resource. This issue covers traveling upon the Sea of Dread, as well as how to convert the Savage Tide adventure path that was published in Dragon magazine through to the Mystara setting. Although focused on D&D Basic, it can still be used with similar OSR systems.