Corrosive breath

Bonnacon

Lacking any effective use of its horns, the Bonnacon is said to rely instead on a singular and memorable defense: when pursued by hunters, it turns and releases a torrent of dung across a great distance, said in some tellings to cover as much as three acres of ground.

Basilisk

The Basilisk's breath is equally deadly, capable of withering plants and corroding metal.

Akkorokamui

This fluid is reported to cause skin irritations and other ailments in humans who come into contact with it, adding to the creature's fearsome reputation.