Dead Zone



The Dead Zone is a void of darkness created by Garlic that sucks in people and traps them floating through endless darkness. Garlic's son Garlic Jr. has opened the Dead Zone twice, but in both times, he was sucked into it and the void closed up. When sealed the first time, the seal shattered into various pieces, which all have Garlic Jr. knocking futilely to escape.

Overview
In the movie, Dragon Ball Z: Dead Zone, he opened it in an attempt to suck in Goku and Piccolo, knowing that despite his immortality, he could not beat them. But Gohan was able to resist its suction and knock Garlic Jr. into the Dead Zone. Garlic Jr. initially did not care, since he felt that his being immortal would have him survive the Dead Zone, but then realized that he is sealed in.

Garlic Jr. remained in the void for about three years until the Makyo Star got close enough to Earth, allowing him to escape from it. In the Garlic Jr. Saga, Garlic Jr. reopened the Dead Zone in retaliation to his dark plans being foiled (Kami and Mr. Popo had broken his curse on the people of Earth using the Sacred Water). Piccolo, Krillin, Kami, and Mr. Popo were nearly sucked into the Dead Zone, but Gohan destroyed the Makyo Star, draining Garlic Jr.'s fearsome strength and causing him to be sucked into the Dead Zone once again.

By the end of Dragon Ball Z (though it is never referenced following the Garlic Jr. Saga, save for maybe Piccolo's line of the Lookout's being completely ruined "again") he still lives, immortal, and is still trapped inside the Dead Zone, never to escape, and very likely regretting his immortality.