Bone Dance

The Bone Dance was a hill located in the Border Forest of north Faerûn. Around the Year of Wild Magic, 1372 DR, it was the site of ghostly apparitions of skeletal monsters that danced around the peak of the hill and attacked any intruders. The Bone Dance was sacred to a tribe of Malar worshipers known as the Rauthtor.

Geography
The Bone Dance rose out of the dense trees like a bald dome in the southern third of the Border Forest, north of Dagger Falls and the Desertsmouth Mountains. The hill was almost devoid of greenery and was studded with sharp boulders and megaliths that formed a spiked crown around the top and created obvious trails up the sides. The surface was mostly a scree of gravel and dirt that cascaded down the slopes but eventually gave way to underbrush toward the foot of the hill. At the apex was a roughly circular depression about forty to fifty feet (twelve to fifteen meters) across and twenty feet (six meters) deep.

Features
Approaching the base of the Bone Dance on one side was a cleared path outlined by rows of large boulders, known as "the Throat". It culminated in a wider area with a stone table or altar in its center, made of a flat slab atop three smaller boulders. Another altar—much larger, more rectangular, sitting on two flat boulders, and darkened by years of repeated bloodstains—rested at the bottom of the bowl at the top of the hill.

The Bone Dance
At various times, day or night, oversized phantom skeletons of a wide variety of monsters pranced, marched, or cavorted above, around, and through the spiky crown of megaliths that surrounded the pit with the large altar. At night, the figures were outlined in an eerie glow that made them visible from far away, but in daylight, observers had to get dangerously close to the hill to see them. Those that survived an up-close encounter with the dancing denizens reported seeing bony behirs, chimeras, dragons, giants, hydras, illithids, tanar'ri, trolls, and wyverns, all of impressive size and fearsome visage, their heads scanning the surrounding forest for prey, but missing their feet—the apparitions faded away at the ankles. Often, the monsters had extra heads or limbs. Occasionally, the skeletons became fleshed out, displaying a body, fur, or hide, only to fade back to a skeleton a short time later.

Normally deathly silent, sometimes the Bone Dance would emit a wolf howl, strange hoots, or a roar that shook the ground and could be heard for miles (kilometers). The folks of northern Daggerdale named these bestial roars "longthunder". When an intruder was spotted, the Bone Dance erupted in spine-tingling snarls and growls as all the phantoms gave chase with the obvious intent to rend the interloper limb from limb.