Crafthorns are quite a lenient species when it comes to rarity restrictions, however there are some guidelines that must still be followed. Crafthorns come in four rarities, two of which are more common, the other two being very rare.
Common
-No major body changes
-Accessories (clothing, jewelry, halos, hats, crowns, piercings, etc)
-Weight edit
-Hair on the head
-One set of 2 horns within the cow/bull/deer/elk/moose/etc families
-Solid colored marking and orb
-one craft
-Stubby, horse-like, or cow-like tail
-Fur textures (curly, long, frizzy, hairless, etc)
-Injuries, common birth defects (blindness, missing eye/leg, smaller/larger than average)
Rare
-Cloven hooves
-Three or four horns
-Albinism/melanism
-Different type of ears from existing animal species (besides human)
-Long doglike or catlike tail
-Disproportionate body types (very long body, very long/short legs, large head, etc)
-Roman nose (snout/forehead is one straight or slightly convex line, like a Clydesdale horse)
Legendary
-5 or more horns
-2 or more crafts
-Multicolored orb/marking
-wings (any type/size/amount)
-non-fur textures (scales, feathers, plates
-elemental traits
-extra eyes, ears, tails
-glowing parts of body other than marking/orb
-reptile, aquatic, bird, or other tail type
Mutated
Anything which is not listed above, excluding illegal traits
Illegal traits:
-No horns
-No craft
-No symbol