having cornice (similar to thiṇṇai that we see in traditional houses) made with crystals which have radiance similar to lightning —

ŏh clouds which are having increased beauty due to the presence of lightning which is shining! —

churning that manthara mountain (churning the ocean) such that the radiant moon, sun, sky and other lustrous entities spun around with him —

the bright light/shine —

(having a blinding effect for the one who saw ) such expansive brightness —

emitting radiance similar to lightning —

having the lustre of lightning —