Element Lad's death

Jan Arrah was the last survivor of Trom, a planet of very powerful species able to transmute matter into the elements at will. He joined the LSH and served for a long time.<br />
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But he and several teammates were lost in a transdimensional rift and thrown outside the known universe. The only one to remain conscious, he put his friends into suspended animation and calculated the way home without computers over years. Then, using his awesome powers, he braved the outside of the wrecked space station and powered a way back into the universe. But the transition sheared him away from the hull and he was lost forever.<br />
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This whole story was told in the miniseries Legion Lost. Good stuff if you can find it, even though the whole LSH mythos is being revamped this winter.