There is a leyline of immense power in @The Planar Nexus Caverns that rest below @Lord Thamtew's Estate, accessible through where @Lord Thamtew Coatturner built the @Daargon's Rest Cellars. There is a tunnel system that he had excavated by miners hired from @Hammerbreak-by-the-Brine, led by @Skarhar Chainbuster. The leyline can amplify and augment many magical abilities. @Lord Thamtew Coatturner uses it to infuse enchantments over time into objects, turning the mundane into magical items. It seems the power is somewhat chaotic, but he wants to control it to make powerful artifacts with strong arcane properties.
While @Lord Thamtew Coatturner wants to use the leyline for his own purposes, he was told of its location by Dagon of the Shadowsea for a more sinister plot. @Lord Thamtew Coatturner turns a blind eye to those who live on @Lord Thamtew's Estate, many of whom have been using the leyline’s power to form a connection between this plane and the Shadowsea of the Abyss. This allows them to drink in abyssal waters, flooding their own bodies with twisting energies turning their flesh into obyrith-like abominations; one such as this is known as @Obyrith's Herald. They can also call into this plane a @Shadowsea Hound that acts as a guard.