It is very important to worship Narasimha with true faith. You can get the complete blessings of Narasimha by chanting this mantra.
உக்ரம் வீரம் மஹாவிஷ்ணும்
ஜ்வலந்தம் ஸர்வதோமுகம்
ந்ருஸிம்ஹம் பீஷணம் தம் பத்ரம்
ம்ருத்யும் ம்ருத்யும் நமாம்யஹம்
Ukram veeram mahaavishnum
Jwalandham sarvathomugam
Narasimham beeshanam tham pathram
Mruthyum mruthyum namaamyaham
Jwalandham sarvathomugam
Narasimham beeshanam tham pathram
Mruthyum mruthyum namaamyaham
Narasimha, the incarnation of Lord Vishnu with anger, valor, radiance, (brightness)! No one who makes mistakes can escape from you who are looking in all directions. You are everything, showing fear to enemies. I adore you heartily. Worship Narasimhara heartily during the morning Brahma Mukurtha. Everyone should recite this mantra and get the full blessings of Narasimha.