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