Green Lantern: Emerald Dawn#3(1990)

While Green Lantern is fighting with a yellow alien, he wonders why his ring seems to have no effect. As the powerful alien becomes more aggressive, Hal's concentration breaks, and his connection to the ring's energy is broken. Enraged, the alien leaves, wondering what happened to the Green Lantern's trail. Hal is confused and depressed, and in an effort to get back to what he knows, he hitchhikes to the hospital where his recently paralyzed friend Andy is resting. However, when he arrives, the car is stopped by a police blockade. The police inform Hal that the hospital has been destroyed by the yellow alien, with no apparent survivors. When Hal realizes that the hospital's destruction is his own fault, he realizes that Ferris Aircraft is also in danger. Unfortunately, Ferris Aircraft has also been destroyed, and knowing that the yellow alien is searching for the Green Lantern, that is what Hal resolves to be. He returns to the crash site of Abin Sur's spacecraft, hoping to find the power battery for his ring. When he discovers a large green lantern, and holds the ring to it, he is pulled toward it by a powerful force, and finds himself back in his Green Lantern uniform. Hal, confounded, asks the ring what it's doing to him and is surprised to receive a response. The ring explains that he must charge it using the battery every 24 hours. Hal asks about the yellow alien's origins, and the ring reveals that the alien is known as Legion, and has killed four Green Lanterns including Abin Sur. The ring creates a projection of the events leading to Abin Sur's death, but as soon as it ends, the real Legion appears and attacks. Realizing that the ring has no effect against a the yellow alien, and knowing that he is in a secluded area, Hal decides to use the ship's fission reactors to cause a nuclear blast, in an attempt to defeat Legion.