The most appealing version of Mohini’s arrival narrates as follows. Once upon a time a Bhasmasura, one of the powerful Asura worshipped Lord Siva and performed severe penance. The Lord was pleased and granted the requested boon that whoever he touched with his hand would be turned to ashes. However, Bhasmasura couldn’t believe that Lord Siva would grant such a powerful boon. Therefore he decided to test the validity of the boon on Lord Siva himself. The Lord ran away with fear and approached Lord Vishnu pleading rescuing him from destruction. Lord Visnu decided to trick the Asura. He appeared before Bhasmasura in the form of an enchanting female named herself as "Mohini". Bhasmasura was excited with his passions and forgot his objective. He wanted Mohini to marry him. Mohini agreed subject to one condition that he should promise her by touching his own forehead that he would not think of another women then onwards. Overcome by passion, Bhasmasura forgot the consequences and touched his forehead. Momentarily he turned into ashes. Mohini returned to Lord Siva with the happy news. But on seeing Mohini Lord Siva himself enticed by her beauty. He succumbed to her charms and the result was the birth of "Sastha" or "Ayyappa". Ayyappa was born on the last day of the month of "Dhanu" on a Saturday (More precisely the myth corresponds to January 13th).