Odrun Fell

The Bonebellow Hollow was once called the Owlbear Hollow. The change in name happened when something from the greatclub tunneled too far south and made it's home in the owlbear den. The Hollow sits atop an underground fissure that likely originated from the insect titan migrating beneath the Murkrun Forest. The local owlbear population has become unusually aggressive, and their plumage is slick with resinous oils that come from whatever invader burrowed below. The owlbears are exhibiting an almost hive-like behavior, where they'll be found guarding the cave entrance, dragging prey inward, and arranging bones in unnatural spirals. Explorers who've attempted to chart the Hollow's depths find it difficult to get past the owlbear guards, so no one has discovered the source of their odd behavior.

Hidden in the crook of a crag-lined valley, Bonebellow Hollow appears at first as nothing more than a shallow, moss-choked cave beneath an overhanging bluff. But a closer look reveals claw-scarred stone, claw-marked trees, and broken bones woven into crude totems at the perimeter. The cave's mouth emits a low, rhythmic bellowing sound—as if the wind echoes through a massive throat—and the ground trembles faintly every few minutes. Patches of glowing chitin and fossilized insect husks protrude from the walls like veins, some still buzzing with residual warmth, pulsing in time with the unseen heartbeat deep below.