As you know I've been working on an Exalted conversion project on and off for some time, mostly for Mutant Future. I'm not doing as well at that as I'd like but it's going along, sporadically that is. But the good news is that I've converted a single spell to Rules Cyclopedia/BECMI/Labyrinth Lord mechanics. In Exalted terms this would be a Solar or Adamant Circle spell, so I figured it would be a high level spell in D&D. So here the first spell is. I should warn you that I'm using the d20 spell format and not an Old School one and that this presumes use of Mutant Future's Willpower score Gama World's Mental Strength. It's also incredibly powerful so it might not fit all or even most campaigns.
Cleansing Solar Flames
Abjuration/Tansmutation
Level: Magus* 8, Prophet 6**
Components: V, S and 4 points of Willpower burn
Casting Time: 10 minutes per every 50 sq. miles
Range: Touch
Area: 50 sq. miles +50 sq. miles of shadowland or hellblight per level after 16
Duration: Instantaneous
When the sky is clear and the Sun is at its zenith this spell can purify the deathly corruption of the land. From the metaphysical center of a shadowland or hellblight the mystic begins her sacred work healing the poisoned magic of the land. Whether this is through prayer and meditation or means of occult science is meaningless. As the mystic recites this most holy of sorceries and miracles she reaches into the heavens and grasps a portion of its holy might. Thus a bright spear of light pierces the putrid miasma of death or foul smog of the damned. From this a shining golden aura that can be seen for miles forms just above the caster. The light then collapses into a single even brighter point, and then strikes the caster like lightning. Channeling the awesome power of this holy light through her body the illuminated mystic purges unholy corruption from the land’s magic. She does this at a rate of 50 square miles every ten uninterrupted minutes.
The below is for my sorcerer class. Yes, its basically just a BECMI/Rules Cyclopedia version of the 3.5 psion. I should note that this is version 1.0 of the class. A revised version will come soon.
Cleansing Solar Flames
Evocation
Level: Sorcerer 8
Components: V, S and 4 points of Willpower burn
Casting Time: 10 minutes
Range: Touch
Area: 50 sq. miles of shadowland or hellblight
Duration: Instantaneous
Spell Points: 15
Augmentation: Yes.
When the sky is clear and the Sun is at its zenith this spell can purify the deathly corruption of the land. From the metaphysical center of a shadowland or hellblight the mystic begins her sacred work healing the poisoned magic of the land. As the mystic recites this most holy of sorceries and miracles she uses her innate magical energies to reach the heavens and allows her essence to be sanctified with holy light. Thus a bright spear of light pierces the putrid miasma of death or foul smog of the damned. From this a shining golden aura that can be seen for miles forms just above the caster. The light then collapses into a single even brighter point, and then strikes the caster like lightning. Channeling the awesome power of this holy light through her body the illuminated mystic purges unholy corruption from the land’s magic. She does this at a rate of 50 square miles for ten uninterrupted minutes.
Augmentation: A sorcerer can increase the area of this spell by spending two additional spell points for an additional 50 square miles, and 50 more square miles per every spell point after the 17th. This of course means that the sorcerer must increase her casting time by 10 minutes per every 50 square miles.
*Just magic-user with a more dignified name.
**Modified and renamed cleric variant I haven't gotten around to making yet. You can use the standard cleric class if you like.