according to slavic folklore, a rusalka is the spirit of a young women who was murdered in or close to a lake or river. they appear as beautiful young women with bright green eyes who try to lure men and children into the water, where they will drown them. their shrill laughter is known to be deadly to humans. a rusalka can leave the water at night to sing in trees or join other rusalki to dance in the local meadows, but she cannot live long on dry land. however, rusalki are kept safe with magical combs, which give them the power to conjure water when they need it. according to some legends, should a rusalka’s hair dry out, she will die. a rusalka’s fate can also be undone by avenging her death.