īśvarasyātma-māyayā

atha-therefore; akhyahi-describe; hareh-of the Lord; dhiman-O sagacious one; avatara-incarnations; kathah-narratives; subhah-auspicious; lila-adventures; vidadhatah-performed; svairam-pastimes; isvarasya-the supreme controller's; atma-personal; mayaya-energies.