A couple of years ago I went to Devils Backbone for a day to brew a tmavý, or dark lager, which we named for an old Slavic goddess called Morana.
Morana, just one of several spellings, is the goddess of death and and winter in the pre-Christian Slavic traditions, though traces of her cult linger on in modern day Czech Republic through the annual tradition of Čarodějnice, or Witch Burning Night. Each spring, on April 30th, effigies of witches are burnt in the Czech Republic to symbolise the defeat of winter, prior to the coming of Christianity with Saints Cyril and Methodius, those effigies were of Morana.
In Poland the effigy of Morana, known there as Marzanna, is burnt and then drowned, there the effigy is:
a large figure of a woman made from various rags and bits of clothing which is thrown into a river on the first day of the spring calendar. Along the way, she is dipped into every puddle and pond ... Very often she is burned along with herbs before being drowned and a twin custom is to decorate a pine tree with flowers and colored baubles to be carried through the village by the girls. There are of course many superstitions associated with the ceremony: you can't touch Marzanna once she's in the water, you can't look back at her, and if you fall on your way home you're in big trouble. One, or a combination of any of these can bring the usual dose of sickness and plague.Yesterday I was down at Devils Backbone again, to perform the ancient rite of brewing in order to resurrect Morana, she should be back in time for the Winter Solstice, get your growlers ready!
—Tom Galvin, "Drowning Your Sorrows in Spring", Warsaw Voice 13.544, March 28, 1999