Ridgestringdeer are a maith in deerlore that is filled with some of the biggest and mightiest wights on Earth, as well as some of the weakest. To be a ridgestringdeer, a deer must have a ridge or rod of sinew and gristle, but not needfully of bone. Ridgedeer are the biggest undershed of this deerkind, but seasquirts have rods that meet this hallmark.
All ridgestringdeer have a hollow body, some kind of heart, and can be foldmatched.