Ravana had nectar in his navel which allowed him to survive. The key to his killing was to dry this nectar, which Lord Rama did with help of Prasvapana.
Lord Rama using prasvapana on Ravana (The Ramayana)
Rama using Prasavapana on Ravana
Rama using Prasavapana on Ravana
Ravana had nectar in his navel which allowed him to survive. The key to his killing was to dry this nectar, which Lord Rama did with help of Prasvapana.