The witch in Narva's Hermann tower

In the Great Northern War, the story goes, the mother of the Swedish king was a witch. She sat in the high Hermann tower of Narva and read war spells, and the Russian army could not take a step. The siege dragged on for seven years. A wise man told a soldier called Ivan that only a silver bullet would kill her, and that the shooter would lose his own life. Ivan watched from the far bank. One evening she opened a window, and he fired. An old crow flew croaking from the tower, and an unseen force dragged Ivan into the river. The town fell at once. Ivangorod, people said, was named after him.