अग्नि , a central deity, is praised for his multifaceted roles, transforming into वरुण , मित्र , अर्यमन् , इन्द्र , and विस्ह्नु as he facilitates sacred rites and supports worshippers [rv-5-3-1 ] rv • Book 5 . The hymns celebrate Agni's contributions to prosperity, protection, and unity, urging him to shield devotees from evil, bestow wealth, and guide offerings to divine satisfaction [rv-5-3-4 ] rv • Book 5 .