[Theory] Tobirama and orochimaru the connection

[Mizukata]

hello everyone!it is almost as a given fact that orochimaru belongs to the same line of teachings as the Second hokage...how? simple tobirama teaches sarutobi hiruzen and by extention orochimaru could have been able to gain teachings of the second hokage.
the edo tensei is the second hokages legacy left to the snake summoner and member of the sannin orochimaru.the thing is the third most likely could have erased all traces of edo tensei...so how could orochimaru have learnt it?

My possibility is tobirama was a snake summoner and through that oro was able to study edo tensei.
if this possibility isnt viable the connection between them is true

[-Yashiro-]

That could be but its highly unlikely

[Yusuke Urameshi]

Idk. Maybe Oro read some scrolls or something. That's what he did to learn the RDS.

[Miyata]

Yes didnt they say that the third was the master of jutsu's or something like that... it is possible that he taught orochimaru and a different fashion than the others...

[Itachi Rane]

Oro's goal is to master all jutsus...he surely have learnt it from the forbidden scroll...

[Namikaze Senju]

i dont think they are connected, that means tobirama must be .......

[kibaclaw]

Their connection is danzo who has the same beliefs as tobirama.