This is a general idea -- I'd like seven dragons intertwined together, sort of like a circular mandala. These dragons are in a special arrangement that is my world's equivalent of the Ark of the Covenant, the depiction of the ultimate deities who created the world, will destroy it, and will perfect it
Balaur (Romanian) - A feral hydra breed that is probably the result of a hydra mating with a dragon. They are much more powerful than normal hydra's. When you cut off a head of this creature two more powerful heads grow back instead, but they are extremely fragile to fire attacks.