Where neither Seraphim nor raindrops go...
The world is at the nexus of six planes, with each exerting a powerful influence and grasping for dominance.
The realms are:
the Celestial Realms of the Heavens, holy and radiant in their flames of transformation and judgement,
the Astral Dream, serene and enlightened in its ascended crystal perfection,
the Maelstrom, a realm of total storm constantly turning in ice and lightning,
the Feywild, the savage and capricious realm of primal life,
the Underdark, the unearthly still underground tomb of the dead,
the Abyssal Hells, the infernal flaming chaos bent on destruction.
Thus two based on transformation & creation (Fey & Celestial), two on stillness & sustaining (Astral & Underdark), and two on destruction & chaos (Abyss & Maelstrom). The intersection of fire and light is Celestial, light and air Astral, air and water Maelstrom, water and earth Feywild, earth and shadow Underdark, shadow and fire Abyss.