Eson the Searcher was one of the previous owners of the Power Stone.
At some point, Eson used his Celestial abilities to form a gigantic, skyscraper-sized armored body for his brain-like true form.
While the Collector shows Eson to the Guardians via the Collector. Eson, like most Celestials, seemed to be an extremely powerful and ruthless being. He saw himself as a god, so he used the Power Stone to destroy an entire planet.
- In the comics, Eson the Searcher was a Celestial who was tasked with "seeking". Arriving with the Fourth Host's visit to Earth, he observes first Florida then Lemuria.