Lethal breath alongside gaze

Basilisk

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

Kaliya

some accounts add that his mouths breathed fire and smoke, further poisoning the surrounding land, killing fish, birds, and the trees along the riverbank

Catoblepas

Legends speak of its ability to either petrify or outright kill any living being unfortunate enough to meet its gaze or inhale its noxious exhalations.

Uktena

Its gaze or breath is said to be capable of killing or overwhelming a person outright, and even indirect exposure, such as touching its shed scales or coming too near its resting place, is described in some tellings as bringing death or misfortune to the person and their family.