Haviks, Dusk Baron
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Haviks, Dusk Baron is the final boss of the Risk/Reward Quest, where he attempts to kill The Guardian after receiving the Riskrunner inside The Breach. After fetching the weapon from one of Cayde's weapon's stashes, the Baron meets the Guardian within the Wall's confines, where he sends hordes of his troops down on the Guardian. After losing his troops due to the power of the Riskrunner, he personally confronted the Guardian, where he would meet his inevitable demise.
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