A primitive race of humans, possibly under the protection of the Asgard Protected Planets Treaty. Tiernods live amongst a number of predators, and reside near caves. If a Tiernod were to be chased by a predator, he or she could enter one of these caves and apply an Asgard invisibility device to their bodies, effectively shielding them from the ferocious creatures.
Shades of Grey - O'Neill's rogue N.I.D. group retrieves an Asgard invisibility device, ordinarily used to protect the Tiernods from predators.