A person afflicted with lycanthropy is forever in doubt of his or her own urges and instincts. In human form, a werewolf feels the pull of the wolf's essence within even while trying to integrate into polite society. A lycanthrope can feel the war of emotions in his or her heart, and as the moon grows full, the influences of conscience, religion, and personal restraint do less and less. The full moon makes the change inevitable, but in fact, any strong emotion or traumatic experience can trigger a lycanthropic crisis and allow the transformation to occur.

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The curse of lycanthropy overtakes a person over a period of one night. One or more werewolves howl in the night, calling out to the victim. Soon after, the victim finds himself in the wilderness, under the silvery moon, surrounded by eyes glowing in the night. The victim's will is compromised already, the wild essence entering him and doing battle with his human conscience. The victim and the werewolves crash through the woods together, and over the course of the night, they hunt and kill their prey—usually woodland game, but other humans or even another lycanthrope is not unheard of.

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PLANESWALKER'S GUIDE TO INNISTRAD: KESSIG AND WEREWOLVES