Ithor/Legends

In the fictional Star Wars universe, Ithor is a planet located around the Outer Rim. It is a planet full of lush life, and the planet's surface has not a touch of civilization on it. The Ithorians themselves, otherwise known as, "Hammerheads", have built huge floating cities that don't harm the surface. Entry upon the surface is forbidden, unless you stay there permanently. Some Ithorians are compelled to go down to the planet surface however, as they "hear the call", of Mother Nature. The surface of the planet of Ithor plays host to numerous plants, including the "Baffor" tree, which possesses telepathic capabilities. At one point, scientists attempted to bond the telepathic capablities of the Baffor tree with another, more vicious tree on the planet surface. The result was a new parasitic life named "Spore" form, but it's parasitic hostility forced the Ithorians to lock it away in an asteroid, until it was discovered by miners. ("Spore", part of the "Galaxy of Fear" Star Wars book series.)

However, in later books, the planet Ithor is no longer so lush. During the invasion of the Yuuzhan Vong, ("New Jedi Order", a book series in the larger Star Wars series"), Jedi Knight Corran Horn dueled the leader of the Vong forces, with the planet Ithor at stake. Corran won and killed the commander, but the second-in-command, answering to a higher power, was ordered to unleash a deadly Vong toxic upon the planet surface. The result: Ithor was turned into a barren wasteland.