A Homa is a fire sacrifice. Sudarshana Homa is sacrifice to Sudarshana Chakra ,the weapon of Lord Vishnu.
What is Sudarshana Homa and how to do it?
! Perform Viśvaksena Pūjā and other preliminaries. ! Invoke Sudarśana
in the Kumbha as for Puṇyāha Vācanam and offer 16 upacāras. ! Perform
all the rites of agni mukhaṁ up to āghāram and ājyabhāgam as per
Vadika vidhi or Pañcarātrika Nitya Homa vidhi and then perform
pradhāna homa with the following mantras adding svāhā to the end. One
may use all the mantras according to time and place, or one may just
use the mūla mantra and māla mantra. Homa may also be performed with
the Sudarśana Kavacam - adding svāhā to the end of each verse
There are 9 mantras in all.I'm not giving all of them but only the Mula , Mala & Gayatri mantras with the warning that one should not learn rituals from internet:
1. mūla mantra oṁ sahasrāra huṁ phaṭ svāhā ||
2. māla mantra oṁ kliṁ kṛṣṇāya govindāya gopijanavallabhāya parāya parama puruṣāya paramātmane, para-karma mantra yantra tantra
auṣadhayaḥ astra śastrāṇi saṁhara saṁhara, mṛtyor mokṣaya mokṣaya, oṁ
namo bhagavate mahā-sudarśanāya dīptre jvāla parītāya, sarva-dik
kṣobhaṇa-karāya huṁ phaṭ brahmaṇe parama jyotiṣe svāhā ||
3. gāyatri 1 oṁ sudarśanāya vidmahe | hetirājāya dhīmahi | tannas cakra pracodayāt ||
The following screenshot and all informations given above are taken from a Panchratra Prayoga book.
Few benefits of doing the Homa-
Protects us from enemies and evil spells. Remedy (Parihara) for
breaking the evil spells. Removes obstacles and makes your mission
successful. Remedy from 10 different types of Mantravada doshas from
10 directions called Marana, Uchatana, Mohana, Vidhveshana, Manthra,
Tanthra, Visha choorna, Prayoga, Abhichara and Kruthrima. Helps to
improve our business. Removes your worries and grants happiness.
Protects our property. Improves our energy level. Grants the
performer health, wealth and prosperity Protects home and family
from evil forces like Bhoota, Preta, Pishacha, Dakinee, Shakinee,
Mohinee Brahmarakshasa, Betala. Eliminate undesirable elements.
Relief from unexplainable diseases and illnesses Rremedy (Parihara)
for “Drishti doshas”