Godzilla kills Hedorah

Chunks of the sludge monster were ripped loose.  As he grappled with the creature, Godzilla opened his jaws and let loose with a blast of radioactive fire.
And Hedorah began to burn.
Still Godzilla poured more and more fire on the sludge monster, which squirmed helplessly under the destructive torrent.
With a shrill cry of unearthly pain, Hedorah began to break apart.  Its huge eyes popped and sizzled.  Chunks of its body broke away as the fire from Godzilla’s maw consumed it.
Then Godzilla closed its mouth and stared down at the creature.  Hedorah’s arms and legs were flailing blindly as it struggled to rise.  Godzilla blinked and snarled; blue lightning danced across his three rows of dorsal spines.  A blast of withering energy burst from Godzilla’s throat.
Godzilal dug in his hind legs, fighting the recoil of his own blasting stream of unimaginable energy.  The sludge creature sputtered and sizzled.  The ruins of the castle began to burn, too, with Hedorah trapped in the center of the firestorm.
With no rain to protect it or help it to reform, the monster made of sludge and industrial waste bubbled away.  Osaka Castle and the land around it continued to burn, serving as a funeral pyre for the dying monster.