In The Fourth Shinobi World War Orochimaru gained Zetsus Body, which granted him his Wood Release (in my opinion all his Techniques) and his Body. What we know about Zetsu is he was one of the first victims of the infinitie Tsukoyomi and were pulled out by Black Zetsu after being cultivated with Hashis Cells. he doesnt has any organs but massive amount of Chakra. The fact that he lived so long in the Statue of the Outher Path makes him near-immortal and he cannot die by simply living but can be killed.
Part I
needing someone to post something, for Part II ..