Who is Airavat, Lord Indra's divine white elephant seen in 'Ramayana' trailer?

The trailer of Nitesh Tiwari's 'Ramayana' featured 'Airavat', the divine white elephant of Lord Indra, king of the Devas (Gods). According to Hindu mythology, Airavat was capable of flight and featured four large tusks, symbolising personal honour, admiration, jealousy and dominance. He is believed to have emerged during the cosmic churning of the ocean - the Samudra Manthan.