A fan site for the Marvel Heroic Roleplaying Game by Margaret Weis Productions
Thanos loaned out one of the Infinity Stones in order to help claim a second. He wasn’t expecting it to fall into the hands of S.H.I.E.L.D.
The Mind Stone hidden inside the scepter helped Thanos erase half of all beings by tapping into every mind in the universe to identify all life.
You’ll note that holding more than one Infinity Stone makes the wielder nearly unstoppable. This isn’t by accident. No character may use more than one Infinity Stone power set at once, unless they hold the Gauntlet, which will be detailed in the future. If you’ve got both the Mind and Space stones, for example, you cannot use both at the same time.