Long ago, Dezalk suffered an injury and was sent to Karzahni to be repaired. He was rebuilt, but into a weaker form. He was then sent to spend the rest of his life on the Southern Continent, as Karzahni was ashamed of his own poor abilities.[BL2] During the Great Cataclysm, he was amongst the Matoran living on a piece of land which was shot out of the continent's dome and onto the surface of Aqua Magna, the island of Voya Nui.
When the Piraka arrived on Voya Nui, they lied to the Matoran and told then they were Toa, and put Dezalk to work with the others. However, he was later taken by the Piraka, under the guise that he was in a searching mission deep in mountains. They exposed him to the effects of Antidermis, making him susceptible to their commands. The Piraka used Dezalk to betray the other Matoran, having him tell them to go to their fortress. All the Matoran were then enslaved as a result, with only the members of the Resistance Team escaping.[BL1]
Dezalk was taken into the Nui Caves with the rest of the Matoran to survive the descent of Voya Nui back to the Southern Continent.[BL8] After being returned to the Southern Continent, he began helping the other Matoran rebuild Voya Nui.
- An unused Matoran sprite from the Voya Nui Online Game was suggested to be Dezalk by BZPower member and BS01 user PeabodySam to Greg Farshtey, and was accepted as his official appearance.
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