The Index category is the main category -- all other categories should be subcategories of this one.
“After all this, all the Mamodo in the Mamodo world (along with Brago) lent Zatch their power...Golden Spellbook
“The King Festival is when there are only 10 mamodos left in the battle to become king. Right...King Festival
This category has the following 3 subcategories, out of 3 total.