The Firseid Sandbox
The Dust Swarm
A roiling mass of white and brown dust ...
A roiling mass of white and brown dust, continuously solidifying and reorganizing, but always maintaining a vaguely humaniod shape, approaches slowly from the far end of the cavern. It chants constantly, and it slams its massive fists on the cave walls, causing small rocks to dislodge from the ceiling. The chanting you’ve heard seems to be coming from it in multiple voices, saying over and over again, ‘Bring the dead to me.’
This monster is a giant, semi-intelligent swarm of animated bone dust. It is able to split itself into multiple entities.
Although the party does not know much about it, it was encountered in a cave below the barrows of the Hill People near Latani.