Hanuman assumed Panchamukhi or 5-faced form to kill Ahiravana, a strong rakshasa black-magician and practitioner of the darkish arts through the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the only real solution to kill him was to extinguish five lamps https://www.instagram.com/tantramantraaurvigyaan/