The Obsidian Trenches form a scorched military frontier within the eastern marches of the Draknaar Theocracy. Towering basalt plateaus overlook ravines filled with ash, steam, and crimson reflected light, while miles of lava tubes descend into fortified training grounds and sealed experiments. House Vurnthrik and House Saurivnos maintain the border watch here, competing for prestige as recruits, spies, engineers, and adventurers navigate a landscape where every passage may conceal a drill, a patrol, or a waking disaster.