They Came to Ask for His Skeleton

The gods had lost, and the reason they had lost is that their weapons no longer worked.

Vritra

Vritra had taken the worlds.

He was an asura of a particular kind. In the older Vedic layer he is the one who holds back, coiled around the waters, stopping them.

Drought is what his existence looks like from below.

And he had won a guard that made the whole armoury of heaven useless.

He could not be killed by anything made of metal or wood, nothing wet or dry, and nothing made by hands.