Mohini is the only female avatar. But the most beguiling of them all. She is portrayed as an enchantress, who maddens lovers, sometimes leading them to their doom. Unlike the Dasavataras, which appear on Earth during a certain period, Vishnu takes up Mohini avatara during many time periods. In the original text, Mohini is referred to as simply an enchanting, female form of Vishnu. In later versions, Mohini is described as the maya(illusion) of Vishnu (mayam ashito mohinim). Vishnu took up the form of Mohini and appeared in front of Bhasmasur. Mohini was so exceedingly beautiful that Bhasmasur immediately fell in love with Mohini (This is what years of austerity does to you). Bhasmasur asked her (Mohini) to marry him. On a side note, the asuras of the vedic times were real gentlemen. The only way to be with a woman was to marry them. Anyways, Mohini asked her out on a dance, and would marry him only if he could match her moves identically. Bhasmasur agreed to the match and hence they started dancing. The feat went for days at an end. As Bhasmasur matched the disguised Vishnu's move for move, he began to let his guard down. While still dancing, Mohini, struck a pose where her hand was placed on top of her own head. And Bhasmasura, whose eyes were constantly fixed upon Mohini's beautiful face, completely forgot about Lord Shiva's boon, and put his hand on his head too and turned into ashes.
Mohini a female Avatar of the god Vishnu.Mohini is introduced in the narrative epic of the Mahabharata. Here, she appears as a form of Vishnu, acquires the pot of Amrita from thieving asuras, and gives it back to the Devas, helping them retain their immortality.
