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.
When been shown to the Guardians via the Collector, like most Celestials, Eson seemed to be an extremely powerful and ruthless being. He saw in himself as a god, so he used the Power Stone in order 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.