Wyverns are draconic creatures that are indigenous to the Higashi mountains. Unlike dragons, wyverns are not sentient and are primarily driven by primeval instincts. However, they are tamable, as the Kuremans were able to breed them as airborne mounts. It is the national animal of Kurema.
They have been known to stalk prey in flocks, collectively referred to as a murder, causing terror in the early days of Kurema. It was also not unknown for a murder of wyverns to attack a dragon in a desperate bid for food, capable of causing enough harm to permanently ground a dragon by shredding the victim's wings with their jaws.