Green Lantern is a DC Comics superhero who wields a power ring that allows him to create energy constructs of any shape or size. There have been many Green Lanterns throughout the years, but the most famous is Hal Jordan, a test pilot who was chosen by the dying alien Abin Sur to be his successor as the Green Lantern of Sector 2814.
Hal Jordan's power ring is fueled by his willpower, and he uses it to protect the Earth and the rest of the universe from threats both human and extraterrestrial. Along with the other members of the Green Lantern Corps, he is sworn to uphold justice and defend the innocent.
Green Lantern's powers are limited only by his imagination and his willpower. He can create anything he can imagine, from simple tools to complex structures and even entire planets. His ring also grants him flight, energy projection, and a protective force field.
Hal Jordan has been a member of many superhero teams over the years, including the Justice League and the Green Lantern Corps. He has faced many foes, both alone and with his allies, and has proven himself to be one of the most powerful and resourceful heroes in the DC Universe.