Great Thunderbug

Description

Some think this type of Thunderbug mutated inside an Elder Dragon.
While they can be seen where Elder Dragons reside, sightings have
also been reported in caves and near water sources at night.

What may look like a single ball of light from a distance could
actually be a group comprised of dozens of Great Thunderbugs. Much
about their ecology is a mystery, including why they form groups.

These aggressive insectoids charge at approaching foes and discharge
all their electricity at once, immobilizing anything they hit.
Hunters encountering them soon find themselves on the ground.