The Labyrinth of Fiery Doom is a portion of Baator that switched over when a fiend discovered how to love. Stormhold is a realm of perpetual thunderstorms, where the good Storm Giant King's palace glows with the color of a cloud's silver lining. A magical pool, infinite to those within, gives healing, restoration, and regeneration to any whom the storm giants wish. Conjurations and summonings bring only the local animals, which are not under control. Divinations cannot contact supernatural or extraplanar beings.
Harmful necromancy is cast at one level lower.
Fire spells are enhanced on the noonday layer and diminished on the night layer. Other elemental spells may be enhanced or weakened by the terrain. Spell keys might be available to reach off-plane sources of information, but other uses seem improbable. Wizardly spell keys are natural objects. Alterations require blown leaves.