“Jörmungandr is a giant serpent that wraps around the entire world. However, the legends do not have it crush its enemies with its giant body or swallow its enemies whole. Jörmungandr’s greatest attack is the symbol of what allowed it to kill the lightning god while also being killed by him.”
He pointed that finger not at Innocentius before him but at the Sea of Japan far below.
And he spoke.
“That is its immensely poisonous breath which can even kill the gods in heaven.”
Immediately afterwards, something purple and carrying lethality shot straight down toward the ocean like ultra high pressure water being used to cut sheets of steel.

Toaru Majutsu no Index New Testament vol.8 ch.3 pt.7