Tyche, was a Goddess who was thought to flirt with fortune and disaster, known later as Lady Luck she bestowed and withdrew her favour at a whim. She was originally considered to be blind, and this added to the doubt and the uncertainty about when one might expect her blessing. The expression “fickle fate” or “fickle finger of fate” comes from this- the blind pointing and bestowing of favours in a certain direction to a person unseen.
According to one set of legends, Tyche found herself embroiled, along with the rest of her circle of deities, in a war between the Gods resulting from the actions of a current lover, Lathander. Tyche kissed him with misfortune and wandered off to explore the Realms of man and the Gods. Tyche was always fickle with her favours.
During her travels, Tyche discovered a budding rose of amazing beauty. Delighted with this, she reached to pluck this delight, which she assumed was a peace overture from Lathander, who sought to regain her good graces. Lady Luck was astonished that she could not pluck the rose from its bush. She cursed the rose with bad luck, and the flower's stem broke in her hands. Temper Temper! Tyche placed the plucked rose behind her ear and continued on her journey.
However the rose was a manifestation of Moander, god of corruption and decay. The severed rose stem crept into Tyche's ear and began to rot her from the inside out. Lady Luck now suffered from misfortune herself. Nasty. She should have used a Q-Tip!
When Tyche returned home, she came across her friend, the goddess Selune, goddess of the moon. She was with Lathander, who wished to regain her affections, and someone called Azuth, who had come to referee the argument between the two. Selune wept at the corruption and rot destroying her friend from within. Instead of letting Tyche see this, Selune lashed out with a bolt of purifying light. Tyche's rotted core split right down the middle and a smaller, brighter version of the goddess of luck stepped out, allowing the goddess of the moon to save that which was good and pure in her friend. However, following this first figure from the rotten external shell was another form stunning to behold, but full of dark malice and capricious ill will. As the two emerged, they immediately fell upon each other in hate, struggling madly, and were only separated by the combined efforts of all three visitors.
It is said that Tymora, Tyche's Fair-Haired Daughter, embodies all the grace and kindness of her mother, while Beshaba, Tyche's Unpleasant Daughter, got only her looks. Since their birth, the twin aspects of Tyche - Tymora, Lady Luck, and Beshaba, Maid of Misfortune - have battled each other in a civil war that continues to this day.
So in fact Lady Luck is two people, one good, one bad, and next time you’re sitting at a table ready to start a bingo session, you might do better to call upon the grace and favour of Tymora, Good Lady Luck, rather than her twin sister, Beshaba, who will only make sure you don’t win!