User Image - Blocked by "Display Image" Settings. Click to show.
Image from here

Set. Oh where to start? Set is considered one of the most ancient of the Egyptian deities. There is evidence of his worship since the Predynastic Period. Set started as the local god for the city of Ombos in Upper Egypt. In her book Egyptian Mythology, Geraldine Pinch stated that there was a theory that the wars between Upper and Lower Egypt was the source of the myth of the conflict between Horus and Set as Horus originated in Lower Egypt.

Even with the first versions of The Contendings, Set was not seen as evil. In myth, Set would ride on the solar barque and protect Ra as he traveled through the Duat. Set was said to be the strongest of the gods. It wasn't until the Hyksos dynasty that Set severely fell out of favor with the Egyptians and his cult declined.

Set had three wives in mythology, Nebt Het (Nephthys) and two foreign goddesses Anat and Astarte. And while Maga is called the son of Set, Set's association with the desert leads some to believe that he is sterile. And stopping there before I head into the land of nsfw

Epithets
He Before Whom the Sky Shakes
Lord of the Red Land
Great of Strength
Lord of the Desert (wind)
The Red Lord
Lord of the Northern Sky
Mighty One of Two-fold Strength

Common Offerings
Food/Drink
Dark rum
orange juice
dark chocolate
coffee
oranges
orange rum
steak smothered in A1 sauce
liver

Items
Knives
Swords
Weapons

Stones
Bloodstone
Garnet
Jasper
Red Tiger's eye

Scents
Frankincense
Myrrh
Patchouli

Colors
Red

Sources:
Henadology
Seth: God of Confusion PDF
Seth - a misrepresented god in the Ancient Egyptian pantheon?
Wepwawet.org