Vampires and werewolves, for absolutely no reason, have always hated each other, despite both being creatures of the night and moon.
Just like the race of vampires, the race of werewolves also has its own world, known as Vargheim.
Unlike Nightingale, the world of vampires which has three moons and no sun, Vargheim does have a sun and two moons, one smaller and the other larger, positioned on opposite sides of the planet.
Vargheim is not completely shrouded in darkness like Nightingale, as it experiences more than 20 hours of nighttime and approximately 6 hours of daylight.
The world of werewolves, Vargheim, is characterized by freezing temperatures, heavy rainfall, extreme and uneven tides in its seas, and highly intense, unpredictable weather and seasonal changes.
With two moons, eclipses are more frequent and complex.
This type of environment would be completely uninhabitable for ordinary humans, but for werewolves, it is a comfortable habitat.