Whenever the Free Peoples found themselves in a truly desperate situation, where things looked so dire that nothing could save a tribe, the same figure always emerged.
Called the Spirit Doctor and the Medicine Ghost, and other similar names; this being is an idea and an audacity, a heritage that says that desperate times require extraordinary measures. When things are truly desperate, inevitably at least one member of the tribe is able to draw upon the bravery and heroism of the ancestors past and draw out the Spirit Doctor.
The person then does what must be done, often in the face of opposition from elder and tribal counsel alike and often opposed and fought by the very people they seek to defend. it is often obvious only in hindsight that somebody was possessed by the Spirit Doctor. Most do not survive this event; but they live on, for their courage and insight are added to the stories of the Spirit Doctor and teach and inspire a new generation.