Semi-corporeal creatures are not completely incorporeal. Summary::A semi-corporeal creature has an actual physical presence, but more often than not that presence is comprised of countless smaller objects, like stones, dust or smaller composite creatures that move contiguously and are bound to the spirit's will. Semi-corporeals possess certain traits akin to swarms, but they have the collective consciousness of a single creature, rather than a swarm of creatures. Semi-corporeals are naturally incorporeal spirit entities that accrue matter and objects in order to take physical form. The encompassing spirit entity can be considered as intangible for the purpose of fighting the monster, and is usually unaffected by the loss of its physical body. To truly kill a semi-corporeal, the spirit sust