[james0246]

Originally Posted by HiroInazuma

Spoiler for manga:

I thought Hydra mode was like HErmit mode but I don't know about any snake elders

Originally Posted by BlackShinobi07

Spoiler for manga:

Hydra? Where did you hear that?

Spoiler for major spoilers:

The Hydra form seems to simply be a wierd ass experimental form created by Orochimaru mimicing snakes...like many of his moves. I do not think it is a jutsu/mov/form taught by snake elders (if there are any snake elders).