In the Manga, the akatsuki refered to Gaara as
"ONE TAIL", and Naruto "NINE TAIL". SO if t here object is to get all the demons with tails from 1 tails to 9 tails, could it be this? In the manga, that summoning brought the creature with nine eyes. And nine eyes must refer to the list below. Since there object is to aqquire the youma's so the youmas must appear soon. SO the below could be the youmas. I also got info from someone else too for this list.
Here it goes:
"X-tailed" youmas --creatures from Japanese mythology
One Tail
Shukaku, a youma in the form of racoon in Japanese mythology. (No wonder the Akatsuki starts to call
Gaara's Shukaku One-Tail these days, seems like there's tradition to it)
Two Tails
Nekomata, a youma in the form of cat, which possess the power of death.
Three Tails
Isonade, a youma which looks like a giant fish.
Four Tails
Sokou, a youma which looks like a reptile. In Japanese mythology, it is a mixed creature of a
rooster and a snake, and the rooster and snake are husband and wife within the Sokou's body.
Five Tails
Houkou, a youma which looks like a dog. It lives in an ancient tree in mythology, and its five tails
posess the five elemental powers: fire, water, lightning, earth, wind.
Six Tails
Raijuu, a youma in the form of weasel, has four legs and very sharp claws (duh....)
Seven Tails
Kaku, a youma in the form of badger (what's the difference between badgers and racoons and weasels??
I'm not really clear on this -_-;;, but.....)
Eight Tails
Hachimata, a snake youma, with its power rivalling the Kyuubi (S-levelled youmas, I should say). In
the Japanese ancient mythology book KOJIKI, Hachimata has eyes as red as sour sauce (must be some
Japanese cooking sauce, I persume....I wonder how red it is...hmmm), and it has eight heads and
eight tails, with a lot of trees and vines growing on/with it (I wonder what that means, like trees
growing on snake's body or what???)
Nine Tails
Kyuubi no Kitsune, the demon fox. (I think kitsune means fox?) Anyway, everyone knows this, so I don't
need to type the rest of it..
, maar het blijft toch nog cewl 
