Hanuman assumed Panchamukhi or five-faced kind to destroy Ahiravana, a powerful rakshasa black-magician and practitioner with the dark arts in the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the only real technique to kill him was to extinguish 5 lamps https://www.youtube.com/@Mahavidyabaglamukhi