Sudarshana Ashtakam is a prayer dedicated to the Sudarshan
Chakra of Lord Vishnu. Below is the Sudarshana Ashtakam in Tamil text in pdf.
The prayer is chanted for overcoming fear and for defeating enemies. The
document in pdf in Tamil language is provided by Sundar Kidambi of prapatti.
Link – Sudarshana Ashtakam in Tamil