It seems she had indeed gained it through...unorthodox methods. Sasuke's eyes remained fixed on her as she gave her explanation. Confident, she seemed. Perhaps one day they would meet in combat. Sasuke was intrigued to say the least. Nonetheless, her description was valid and it seemed she understood what she was talking about.
"Yes, the Wood Element is well known for its versatility. My ancestor, Uchiha Madara, fought his rival, Hashirama quite often. Despite his..visual prowess and general combat skills, Madara had difficulty taking down his Senju adversary. This was due to the Wood Element. It would creep through every defense, bind every danger and easily dismantle any obstacle. It was an extension of Hashirama's will. Or so the stories go. That very same power, now rests..with you."
Sasuke says, as his eyes beam red. Removing his hands from his pockets, and stepping forward from his leaning position against the large oak tree, Sasuke looks at his student.
"As you well know, I am Sasuke Uchiha. I will be teaching you of the Wood Element. Unlike others, my teaching methods consist of interaction as well as visualization. Watch closely."
He says, as he focuses a large amount of chakra between him and his student. From nothing, a dark golden flame manifests. Its edges dark yet its center golden-brown. It swirls through the air and fills the area before them. Suddenly, it takes shape. The flame manifests into a large pole, seemingly made of Wood.
"Your first assignment is to form a wooden pole. Focus within the Earth before you. You may use the trees too. However, using Earth as a medium makes it easier. Find the particulates within it, focus on it, and think of growth. Life. Ironically, I am using Yin Release to showcase an element that is arguably very Yang based. The larger irony being that an Uchiha is teaching about the Senju. Nonetheless, focus and shape it. A staff.."
He continues, as the flames shifts its form as he speaks.
"..perhaps a projectile like shuriken, a sword, a knife..or even an inanimate man."
The flames form into an odd man like shape.
"This can all be done with Wood, through manipulation. Now focus."