The collars are for possibly violent and dangerous animals kept as pets. the key feature of the collar id that the have an enchanted crystal embedded in the centre above the animals neck. them crystal is usually azurite a manly blue with green edges and yellow specks throughout it, it is the most magic acceptant crystal. the collar can be used on anything.
Azurite, fabric/metal ( depends on owners preference of collar.)
first invented in 654th year of the Deca Period
Makes violent or dangerous animals suitable for pets.