Tobi is extremely strong.
Madara is extremely strong.
Izuna and Madara where sayed to be equals.
Izuna was younger , but was at the same level.
Both of them trained constantly together , when they where little kids.
Madara became leader of Uchiha clan.
Izuna gave hes eyes to Madara for EMS.
Izuna had replacement @ that time.
Izuna used 3 tomoe sharingan from that time.
Being a Superior Uchiha , Izuna was able to bring the 3 tomoe version to extremely high level.
Izuna developed S/T Migration technique to excist out of dimensions = Different flow of time = another reason , why he looks maybe 50-60 years old.
Izuna used somekind of clone technique.
Izuna fooled hes own brother.
Izuna took on a new name "Tobi".
Izuna used Hashis cells to lengthen hes life span and look younger.
Izuna developed a new personality.
Izuna is master manipulator and decevier.
Izuna started to wear masks = hes face is most likely deformed and to hide hes identity from possible threats.
Izuna and Madara formed a plan @ some point in time "Moons Eye Plan".
Izuna promised Madara to ressurect him VIA Rinne Tensei in the future , when Nagato is older.
Izuna gave Nagato the rinnegan.
Izuna guided Yahiko to form Akatsuki.
Izuna formed a plan how to wipe out the Uchiha Clan , since they can oppose hes Sharingan = Namely Itachi and Shisui.
Izuna needs Sasuke for some "reason" = most likely to pass on hes will to him = Izuna knows , that hes time is not infinite.
Izuna later on took on hes brother name , to deceive the 5 nations , to fight in war.
Izuna took back hes "Rinnegan" = Madara geting blind = needs brothers MS = for EMS = Madara awakened Rinnegan = Madara died = Rinnegan was placed in a new host = Nagato , most likely @ very young age VIA high level of Genjutsu , to make it look like nothing happened.
Izuna is master @ using the Rinnegan and controlling Kurama.
Any opinions?