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