Black Rain

This spell is one of the "Ultimate Evil Spells"; a Curse, that can only be cast by a Cabal of Dark Sorcerers or Warlocks or a mixture backed by some Entity such as the ""Great Old One' or 'Elder god' of Chaos such as: 'Nyaralothotep".  

To Cast this Spell: the Cabal or Group casting this spell gathers in one mind and purpose, their leader recites this one "Forbidden Spell" while the other members focus on the leader or their separate spells being cast simultaneously providing a body of curses; evils ; and plagues as a backdrop for the summoning's of this curse.  As these spells are cast, the leader of the group casts the main spell opening the door to and summoning creatures of ultimate darkness and Evil to set loose to run rampant and plague those within the area of effect and around the immediate area as allowed by the presence of evil within these areas.  Hoards of Demons, Devils, and other Ancient Evils are loosed upon the planet.  At the culmination of the casting of this spell, the Leader or a Volunteer High Priest of Evil or Evil gods sacrifices the 5 victims or volunteers.  The difference; victims have no choice in the matter, may be represented by a Paladin or Champions (backed by their God ((Jehovah) or Gods) in attempting to intervene and save them.  The ordeal is truly and ultimately horrific and it is the power and horror of their fear that helps feed the carnage and the gruesomeness of the experience and that fuels the power of this spell.  Duration increases by 1 day per victim killed (sacrifices and undeclared sacrifices killed within this spell's area of effect).  Volunteers, have the choice to willingly endure the horrors, deaths, and pain of the experience and it is their faith or lack thereof that helps determine the spells success or failure.   In the end, it is the power of faith, backed by God that determines the outcome of this spell.  If it is overall positive, the people will have a Hero succeed and help stop the carnage, destruction, and kill or defeat the Leader of this spell and the sect responsible for the great evil being done.  If the faith shown is overwhelmed, the faithful are mostly defeated (slain) and the full effects of this spell take hold.  This evil is loosed upon the land with all manner of evil and  loathsome creatures in a war of attrition for an age (100 Years).  And the champion(s) are defeated.  But some ruminants of Good and Evil always exists until the final battle.  And like the sages always say, "Evil never dies, it only is defeated for another day...  

All available classes (both Good and Evil) can be involved with the casting of this spell as this spell can be a focal point in the ongoing war between Good and Evil and all participants according to their Alignments can help to tip the scales to one side or the other in this struggle.  Ultimately, the spell level of this particular spell can go much higher than 9 in that my own games have provisions for (according to Legend) ca go as high as (supposedly) 72, with the reverse equivalent...