The dragon made from countless organs and mouths had split open its maws. And it released a thick deluge of what may have been stomach acid. With the force of an industrial water jet, the counterattack split the battlefield along a straight line and erupted beyond the horizon. Something like a cumulonimbus cloud explosively grew on the surface, but that may have been chemical smoke with the properties of sulfuric acid.

Toaru Majutsu no Index New Testament vol.20 prologue