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Wizard Weather by Janet Morris (
ISFDB,
Wikipedia), another story in her popular Sacred Band of Stepsons (
Wikipedia) sub-series within the very popular Thieves' World (
Wikipedia) shared world fantasy anthology series, this installment originally published in the Storm Season volume out from Ace Books in 1982.
Tempus' Stepsons on their first mission....
When Askelon of Meridian, lord of dreams, and Jihan, Froth Daughter, come to Sanctuary, a killing mist precedes them and everything changes for Tempus and the Sacred Band of Stepsons and even the local storm god. In the course of this story, Nikodemos receives from Askelon a dream-forged panoply; Tempus' sister and Askelon of Meridian join forces, and the Froth Daughter lends her inhuman aid to Tempus' Sacred Band. Stepsons die and events are set in motion that reverberate through the entire Sacred Band series as even the gods contest in Sanctuary's heavens.