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Being the first user of the yellow ring before Fear was the emotion that controlled his ring, Sinestro was already feared throughout the galaxy. Once one of the most prominent Green Lanterns in the Corps, Sinestro now became the master of fear in the galaxy after he embraces it. Taking the entity of fear known as Parallax and its ideal to heart, Sinestro based his own corps off of the power of fear. While it does have an element of “of course he did” to it, it wasn’t unwise on his part. Some of the most terrifying entities in space became members of the Yellow Lanterns such as the Anti-Monitor, Cyborg Superman, and Superboy-Prime. With two of those being former lead antagonists of two different Crisis events, there is still one that rules over them all with fear besides Sinestro, and in doing so proves just how powerful fear really is.
Parallax Takes All

In the infamous Green Lantern story “Emerald Twilight”, Hal Jordan goes over the edge and becomes Parallax. Hal unwittingly became the most powerful being in the universe at the time, absorbing the being Parallax who was locked away in the central power battery on Oa. With almost every Green Lantern dead, Hal became unstoppable. His greatest feat as Parallax was causing his own Crisis event, Zero Hour: Crisis in Time. Much like the original Crisis on Infinite Earths, Zero Hour was about Hal destroying the time stream to remake it how he sought fit.








