The idea is based of the theory that there was a technologically advanced civilization. They disappeared without a trace but there tech is still around. Every thing that people have seen as magic was nothing more than advanced tech. The worlds leaders have recently developed an origination to find all the artifact. There are an unknown number of artifacts. Each artifact have a draw back equal to it power.
a few concepts
There being a descended of Thor being the only person able to lift his hammer.
the spear of destiny
the armor of god
and any thing like that.
the story might be the squad tries to stop the people from misusing the artifacts. Then stops all hell from breaking lose when the artifact are used.