No reason you have to change the alignment of magic, just make the Moon an evil thing, and the darkness of caves the "peaceful, moonless" regular Weave (owned by Shar the Guardian). Evil critters draw power in moonlight, when the Shadow-Weave is waxing. Good is hiding from the planet's surface, since those evil sun and moon gods keep rising.
- Great Pyramids of Lathander: As an evil Sun god, Lathander requires daily human sacrifice. Use any Aztec images you can.
- Illmater is still the god of Suffering.

"Do unto others, lest they do unto you first!" His legions always try to strike to subdue, so they can torture you more later. "Make no quick cut that you might savor slowly."
- Bane is short for "Tyrant's Bane": he's a CG god of freedom. The Fey like him, unless you reverse the Fey, too -- but I don't know how good a Nymph would look in a goatee.
- Lolth is the LG Weaver-God, patron of all creative endevors involving cloth. (Her name is a variant on "Cloth".) Her symbol is still a spider. The Sun-Scarred elves, those hated by the evil Sun god and burned to blackness for their valor in fighting his flaming minions, worship Lolth from their caves of peace.
- Malar is the righteous fist of Nature, striking back at the depredations of the dominant evil gods. He has paladins.
- CG Beholders
all have goatees. It's just too amusing to avoid. They were created by the evil Moon goddess in her evil image, but quickly rebelled -- they were granted too much intelligence to remain evil. Their numbers are small, but they will aid the cause of Good however they can.
- Unicorns are called "Pikes of the Tyrant". These LE beasts serve as the shock-cavalry of LE Elven gods. Only those blessed by Shar, the NG Black Unicorns, are equipt to fight the Tyrant-Pikes... who can only be ridden by slatterns!
- Tempus is the LN god of regimented battle. Helm is the CN god of barbarians. Torm (short for "Tormentor") is the CE patron of Blackguards.
- LE Bamf Dogs (they make a "bamf!" noise, and leave a cloud of sulphur & brimstone when they Dimension Door) battle NG Displacer Beasts on the open plains.
- LG Talos the Life-Giver, the Rain-Bringer, both feeds plants and shields the righteous from the gaze of the evil sun and moon.
- LG Auril brings life to the icy wastelands.
- NG Mask, the Bright Shadow, is the patron of those who fight evil governments using stealth.
Good luck, enjoy, and keep us posted! -- N