Dark Star Thresh

Actually that skin deserve that name. Every thing begun when Cho'Gath realized that the undead chain and hook from Thresh was capable to travel between dimensions he decided to make a deal with the chain warden. The creature known as the Terror of the Void offered Thresh all the souls to torment that he could ever imagine, the only think for exchange was to help him with his hook. They traveled to Icathia to find the Prophet of the Void because they needed his help to open a portal big enough for every creature from the other dimension. After every thing was ready accord Malzahar, Thresh trowed his hook thru the portal , this hook was stronger, protected by the dark magic of Malzahar its power was enough to grab the fragile land of the creatures from the Void from one dimension to other, creating a bridge between worlds . But they never kew that the Void Walker was aware of their plans and he was not alone, he was accompanied with a rare creature known as Fizz the Tidal Trickster. As soon as the ritual begun Kassadin jumped into the Void while Fizz was trying to stop the ritual from Runaterra, both focused on the chain, but its magic was to strong, luckily the enchanted trident from Fizz was strong enough to pull the chain so hard that the land from the creatures of the Void started to break down, there were to many strong creatures for Kassadin and he could not resist any longer, the Trickster was not strong enough to defeat Cho'Gath and Malzahar together so in a desperate last try for saving Runaterra he jumped into the portal dragging Thresh with him. Now the two of them were trapped in the Void and it was already breaking down, there was no other choice, the Void Walker rushed to reach his friend, as soon as they were together Kassadin told him to grab him fast before the portal closed, in the way back to Runaterra Fizz couldn't ignore the horror of looking at all those horrible creatures dying*[zombie-nunu-tears]* , those images of living creatures risking and losing every thing in one last chance for saving their world shuddered Fizz's heart, but he din't knew if what he felt was fear, hate or shame . The light was getting closer , they could already fell the warm from the desert, they were never that happy to see Runaterra again when... cKlatsHhh!! Thresh threw his hook before they could scape graving Fizz by his front head, before letting Thresh cross the portal with them he told Kassadin that he was wrong, that there may be still hope in this creatures*[zombie-nunu-hearts]* and he was about to figure it out, then the Trickster made his last trick letting go his friend and he condemning Thresh and himself to THE VOID!. Many years latter Fizz apparently found his was out by taming a creature from the Void that was similar to sea creatures from Runaterra in some way. He trained the insatiable creature to open a portal with its jaws on the scar between dimensions. But when he came back he was not the same, a third aye grew up on the wound from the hook, his skin turned purple and shining. When he finally returned to the place where every thing begun he found the place destroyed, the rocks was burned like with magic, then he remembered that Malzahar and Cho were still outside the portal before he letted go his friend, who knows what could had happened in that battle between those two wizards and thad beast. Thresh was not that lucky he remained alone in the darkness more time than any other else from Runaterra, he was no match for the creatures in the Void so it was imposible for him to fed from their souls, he started loosing control of his ability to suppress souls, the victims he captured all those years were now tormenting his oppressor, one by one they where driving him crazy (more crazy). He became a scavenger of souls, he remained in the shadows while other creatures were hunting, waiting just to send his lamp after it was done just to grab those demonic souls escaping from their remaining dead bodies eaten by other creatures from the Void, his madness finally turned him into a beast that survived eating souls from the creatures from the Void, this souls are not the same as those from Runaterra and they turned Thresh into an abomination beyond any thing that Runaterra have ever seen before. He never thought that could ever exist more torment than his but hi found it and he found it in a place he decided to call THE DARK STAR and now that he found a way to come back to Runaterra, he will come back but not alone.

-The dark star is coming and now there is nothing you can do about it- Thresh

(Sorry for my english :v)