BRAINIEST IF CORRECT! Who Gave Madara Uchiha the ability to use wood style and who originally owned the wood style that Madara Uchiha gained. (The real Madara and not Tobi)

During the battle in the valley of the end, Madara fought with Hashirama and he bit off a piece of flesh of Hashirama, cultivated it, and implanted it onto his body.

Obviously Hashirama is the original owner of the wood style.