i roughly say..
madara bloodline is actually a mixture hyuuga bloodline n a
foreign(means not konoha ppl) bloodline..tink most of e ppl know
abt this..
in short madara dad(a Konoha tengu) is tat "foreign bloodline" n
he's a semi-demon while his mum a hyuuga..
so this is how Sharingan is created..
same as itachi, madara since young was v talented in both combat n
jutsu..
n his gd fren was Shodaime..
den 1 fine day, madara found out tat his dad real purpose was to
kill him n serve it as a new container(as his aim was to get
greater powers)..
there4 to counter his dad motive, madara signed a pact wif Kyuubi
,so as to hav its charka, to fight his dad but only managed to seal
his dad under a curse seal..
n this curse seal is a special one..
as inorder to break it, it needs Kyuubi chakra n 3 sharingan users
to perform 3 diff kinds of sharingan abilities(naming Tsukiyomi,
Amaterasu and Susanoo) at 1 go..
uhm i tink maybe the akatsuki purpose of getting all those
tailed-beasts charka is to release tat "cursed seal"..
for wad? i dunoe..
but it seems to be it..
