इन्द्र , the mighty protector and the lord of rites, is invoked for his supreme protections in battles. As the slayer of वृत्र and unparalleled wielder of the thunderbolt, he is celebrated for his dominion over prosperity and gains. श्यावाश्व and others praise इन्द्र , acknowledging his role in enhancing त्रसदस्यु 's vigor during conflicts [rv-8-37-1 ] rv • Book 8 .