You are incapable of being defeated by any foe, not even by the wielder of thunder-bolt (Indra). Having said this, that boon-giving goddess disappeared.
अजेयस्त्वं रणेऽरीणामपि वज्रभृतः स्वयम्। इत्येवमुक्त्वा वरदा क्षणेनान्तरधीयत॥