The Hindu mythologies have no end. The more you indulge yourself in these mysterious stories, the more intrigued you will become. For every ritual or custom you will find an explanation which is beautifully narrated in the form of various stories. These stories have been passed on from generation to generation and this oral tradition still continues today.
Dashavatar is one intriguing story from Hindu mythology which is an important part of the Hindu scriptures. This story is about the Preserver of the Universe, Lord Vishnu. It is believed that whenever injustice and negative forces prevail on Earth, Lord Vishnu comes in one of his various forms to uproot them. So, Lord Vishnu incarnates from time to time to eradicate the evil forces which seem to threaten the existence of mankind.
Lord Vishnu is believed to have taken on nine incarnations or avatars before now. The tenth and final avatar will descend to Earth at the end of the Kali Yuga (the last of the four stages the world will go through as part of the cycle of yugas). These ten incarnations of Lord Vishnu are collectively known as the Dashavatar.
The first three avatars descended to Earth during the Sat Yuga, the next three in the Treta Yuga, the seventh and eight incarnations appeared in the Dwapara Yuga, the ninth appeared in the Kali Yuga which began in 3102 BC, and the tenth avatar is expected to appear at the end of the Kali Yuga.