The Basilisk is a large, snake-like Abnormal. It has scaly skin and two wings attached behind its head that do not, however, enable it to fly. It spits acid and can breathe fire. When attacking, it scans for faces, especially eyes. This means looking at a Basilisk is fatal. It's completely deaf, but has a strong sense of smell. They used to roam the surface, but disappeared a long time ago when they relocated to Hollow Earth.
There is also a Basilisk feeding ground below the Indonesian caldera.
Natives of Hollow Earth refer to it as a Firebreather.