The Valley Barrier Part 2: King of Madness (2020)

From publisher blurb:

This is part two of a new massive 2-part adventure for the Eldritch RPG! A powerful curse is cast over the Valley of Aesir, preventing anybody from passing an invisible, magical interdiction to travel. Upon arrival, the characters got drawn into a dangerous web of intrigue and murder, all the while investigating the mysterious abductions of the finest soldiers in the hamlet of Taobstay, located about 37 miles as the crow flies southeast of the city of Apex. During the course of the adventure, and through much travail, the plight of the hamlet of Taobstay was allayed, and any immediate threat of the woodshades (a race of extra-dimensional elven) eliminated, but the communication barrier has remained, and escape from the valley remains impossible. Not even the most enigmatic of the foes the characters encountered had the answers to the troubles of the valley, and nothing more than contradictory rumours were learned by the heroes as to the nature of the barrier. It is likely the characters heard the prophetic rumours of the coming of the King of Madness; and yet, nobody knew whom or what he represented, or if he was somehow connected to the barrier. Some whispered that the secret of the barrier hinged on finding a diabolical place called Umbra Keep (otherwise known as Erborshoon), but its location was shrouded in the mists of time.