The Reality Stone was one of the six Infinity Stones, representing the element of reality. Liquefied into a dark red fluid called the Aether, the Dark Elves and their leader Malekith intended to use it to revert the universe to its state of primordial darkness. In 2013, the Aether was absorbed into Jane Foster, triggering the Second Dark Elf Conflict. After their defeat, the Aether was taken by the Asgardians, turned into the reality stone and entrusted to the Collector to hide it in his museum.