Firefly

What’s more magical than a firefly light show on a warm summer night? Just remember that if you catch fireflies, you can keep them in a jar (with a lid punched to let in air and a moistened paper towel on the bottom) for only a day or two before you need to set them free.

Description
A generic name for any of about one thousand different luminescent beetles, the fire fly uses chemical reactions in its abdomen to create light, the specific pattern of which is designed to attract mates of the same species. This chemical luminescence has a unique practicality in your army, where Fire flies can cause a flash of light with their tail so intense that it temporarily blinds all creatures within a certain distance from the Fire fly. Blinded creatures are incapable of using any ranged or artillery attacks, making the Fire fly a useful defense against such creatures.