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|Died||Killed by Elend|
|Featured In||Mistborn Era 1|
He was a friend and compatriot of Elend Venture and Telden Hasting. The three often met at balls and discussed contemporary, even rebellious politics. He and Elend planned to become political allies upon the inheritance of their respective noble houses. His uncle was King Audil Lekal.
After the Collapse Jastes escaped to the Southern Dominance. The lives of some of his family members, including his sister, were lost during skaa uprisings.This was at least in part due to the fact that he tried to implement several of Elends ideas in governing his lands, such as freedom and political honesty, which was seen as a sign of weakness and led to him losing control. As a result, many of his family members were culled off by the new rulers when they took control. He became mentally unstable and recruited an army of koloss by paying them with fake coins. He besieged Luthadel in an attempt to find the Lord Ruler's cache of atium. After losing control over his koloss due to an unforeseen event, Jastes tried to escape north into the Terris mountains. He was eventually caught and executed by Elend Venture, for bringing such destruction down on Luthadel.
|Mistborn Era 1|
The Final Empire · The Well of Ascension · The Hero of Ages
|Characters||Vin · Kelsier · Sazed · Elend Venture · Marsh · Spook · Breeze · Ham · Clubs · Dockson · Straff Venture · Zane · Ashweather Cett · Tindwyl · Allrianne Cett · TenSoon · Yomen · Quellion · The Lord Ruler · Alendi · Kwaan|
|Places||Final Empire · The Dominances · Luthadel · Kredik Shaw · Pits of Hathsin · Kandra Homeland · Urteau · Fadrex City · Tathingdwen|
|Ethnicities and Species||Skaa · Nobles · Terrismen · Inquisitors · Koloss · Kandra · Mistwraiths · Southern Scadrians|
|Organizations||Skaa rebellion · Steel Ministry · Keepers (the Synod) · Worldbringers|
|Mythology||The Deepness · Terris Prophecies · Well of Ascension|
|Era 1 books||Mistborn: The Final Empire · The Well of Ascension · The Hero of Ages |
(The Eleventh Metal · Mistborn: Secret History)
|Era 2 books||The Alloy of Law · Shadows of Self · The Bands of Mourning · The Lost Metal |
(Allomancer Jak and the Pits of Eltania)
|Shards||Preservation · Ruin · Harmony|
|History||Classical Scadrial · Final Empire · Catacendre · Elendel · Southern Scadrian|
|Magic||Metallic Arts (Allomancy, Feruchemy, Hemalurgy) · Metalborn · Mistborn · Misting · Savant · Ferring · Twinborn · Compounding · Atium · Lerasium · Ettmetal|
|Other Media||Mistborn Adventure Game · Mistborn: Birthright · Mistborn film · Mistborn: House War|
He was killed by Elend after threatening Luthadel with his koloss army.