Spell Power Ranking: A
Casters Required: 3 or more.
Description: By sacrificing a high volume of blood or blood highly potent in mana, up to 7.5 miles around the ritual is covered in a non-stop night. Clouds cover overhead, and the sun is incapable of shining through. Light magic is reduced by 60% within this zone, and dark magic is increased by 40%. Subtle fog is also potent at ground level.
Mana Cost: Very High
Limitations/Side Effects: Lasts for up to 1 week. The casters must stay concentrated the entire time this spell is going on.
Cooldown: 1 Week.
Requirements: Very high amounts of blood [hundreds of corpses] or moderate amounts of blood very potent with mana [Dozens of corpses].