When crossing the ocean , Hanuman teaches a lesson to Lankini, the guardian demoness of Lanka, with a mighty punch. After entering Lanka, Hanuman met Vibhishan (Ravana’s righteous brother), and learned of Sita’s location from him. He then met Sita, introduced himself and gave lord Ram’s ring as a proof of his authenticity as a messenger. Having met her with humility, he wreaked havoc in the palatial lawns (Ashok Vatika) and killed various soldiers of Ravana’s army, including his son Akshay Kumar. After that, Hanuman voluntarily surrendered and was presented in the court. After a diplomatic but futile dialogue with Ravan, Hanuman’s tail was set on fire as a punishment. Using his tail as a wick, he set the whole city on fire, and aborted all unborn demon kids with a loud shriek. These exploits are narrated in Sundarkand, the fifth canto of Ramayan which is sung in praise of Hanuman. With this, Hanuman left Lanka, later to return with the Ram, Lakshman and Sugriva’s Army. Hanuman fought the war bravely and played a pivotal role in its outcome. When Lakshman was fatally attacked by Ravan’s son Meghnad, Hanuman flew overnight to Himalayas to find Sanjeevni Bootee (a potent herb) and saved Lakshman.