They must be a tail type of one of the following from this list: deer, any feline, any canine/canid (ie wolves/foxes), any horse tail, any bird tail (feathers must be clustered at base to be singular)
Tails have no marking or colour restrictions
Tails can be different types of tails (for any fantasy ones, you need to use a fantasy tail potion instead)
Potions that will upgrade the tail to that upgraded version: Multiple tails (becomes multiple of the original tail type, so if you had a fox tail, it becomes multiple fox tails), Fantasy tail (replaces existing tail with the fantasy version).
They cannot exceed 100% of the body length of your Stygian
They cannot have any textures or additional unusual shapes added to them without the purchase of other tail-modifying potions
REGULAR STYGIAN BODY LENGTH
The BODY LENGTH of a regular stygian is measured from their chest (without fluff) to where their butt is.
Tails, extra acessories, etc, are not counted into the length of the body. When a trait says 100% of body/ body length, it would be 100% the body length (direction of the arrows from beginning to end) marked in red.
Miniature versions follow the same rules, just with miniature sizing (ie using the body length of that miniature)
LONG BODIED STYGIAN BODY LENGTH
The BODY LENGTH of a regular stygian is measured from their chest (without fluff) to where their butt is.
Long bodied Stygian have much longer bodies than regular ones. When measuring the length of a long bodyied stygian body, take the body length of the REGULAR Stygian above and multiple it by 1.5 to 2x the length
Tails, extra acessories, etc, are not counted into the length of the body. When a trait says 100% of body/ body length, it would be 100% the body length (direction of the arrows from beginning to end) marked in red.
Miniature versions follow the same rules, just with miniature sizing (ie using the body length of that miniature)
BIPEDAL STYGIAN BODY LENGTH
The BODY LENGTH of a bipedal Stygian subspecies (ie Grendel, Page, Sylph) is measured from the top of their head to their toes.
Bipedal Stygian do not include Stygian that "stand" or "pose" on their hind legs (ie regular stygian posing that way) and must be considered a bipedal subspecies that stands on their hind legs in the subspecies infograph (see subspecies info).
Hair, head additions, tails, extra acessories, etc, are not counted into the length of the body. When a trait says 100% of body/ body length, it would be 100% the body length (direction of the arrows from beginning to end) marked in red.
For object head, it would be the approximate length of where the Stygian's regular non object head would be.
Miniature versions follow the same rules, just with miniature sizing (ie using the body length of that miniature)
TREATLING BODY LENGTH
The BODY LENGTH of a Treatling subspecies (ALL) is measured from the top of their head to their toes.
Hair, head additions, tails, extra acessories, etc, are not counted into the length of the body. When a trait says 100% of body/ body length, it would be 100% the body length (direction of the arrows from beginning to end) marked in red.
For object head, it would be the approximate length of where the Treatling's regular non object head would be.