Hanuman assumed Panchamukhi or five-confronted variety to kill Ahiravana, a robust rakshasa black-magician and practitioner of the dark arts through the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the one solution to destroy him was to extinguish 5 lamps burning https://www.facebook.com/share/1J6iVuTuXb/