Deceived or repelled by mirror reflection

Basilisco Chilote

Folklore suggests that it can be outwitted by the clever use of mirrors, which reflect its deadly gaze back upon itself.

Basilisk

In some tales, the Basilisk can be defeated by tricking it into seeing its own reflection, turning its deadly power against itself.

Cockatrice

Folklore suggests that the crow of a rooster can kill it, and that it can be defeated by tricking it into seeing its own reflection.