Though as yet unexplained, conjuntions are implicated in a number of magical phenomena. Once a year, there is a conjuntion when immortals are vulnerable, Halloween, which is the only time when a Darkhallow can be attempted. According to Bob, Cowl knew it, explaining why the Kemmlerites attempted a Darkhallow in Dead Beat.
- Main article: Darkhallow
In Dead Beat, necromancers, the Heirs of Kemmler—Cowl, Corpsetaker and Grevane—raced each other to be the first to attempt a dark spell called the Darkhallow on Halloween night to make themselves into a godlike being.
In the series Edit
- Main article: Dead Beat
In Dead Beat,
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- Main article: Cold Days
In Cold Days, Harry Dresden had to swear on his magic to build Bob a new house if he told him how to kill an immortal. He did. And Bob told Harry that there is a conjunction in which immortals are vulnerable, once a year—Halloween.