Narasimha Moola Mantra is one of the most popular Mantras dedicated to Lord Narasimha. Lord Narasimha is one of the 10 incarnations of Lord Vishnu. Moola Mantra is considered very effective among all Mantras. The Moola Mantra of the deity is most effective in Yantra Sadhana of the deity.
Lord Narasimha is a furious form of Lord Vishnu. It is the fourth incarnation of Shri Hari. Lord Narasimha is also known as Narahari, Ugravira, Mahavishnu, etc.
ॐ नृं नृं नृं नरसिंहाय नमः।
Om Nrim Nrim Nrim Narasimhaya Namah।
Om, O Lord who is half man and half lion i.e. in Narasimha form! You are almighty and all powerful, I bow to you again and again. Have mercy on me.