Finding Alberich the Winged Doom in Absolum, is part of a larger questline involving Karl, and this marks just the first stage of that journey. To begin, you’ll need to have acquired Brome and likely completed the main story.
This is a random occurrence, but once you’re at the hearth or hub, a conversation will occur between Karl and Brome. Karl expresses frustration that, with the Underking now siding with Azra, and given that Karl was forged rather than born, he believes he’ll be the last of his kind.
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