Shape-shifting

Shapeshifting is the ability to alter one's appearance at will. Many beings that have this ability.


 * Salish spirits
 * Unity - can mimic faces and, if powerful enough, whole people
 * "Foothold" aliens - can assume the form of specific others artifically
 * Tau'ri - with technology left behind by the above
 * Replicators - can change their form by manipulating the blocks they are made up of