The user creates a gigantic wooden dragon, which they can they use for a multitude of purposes including restraining a target, or for offensive purposes. It also has the ability to absorb chakra from its target, slowly rendering them unable to use techniques. Hashirama is also able to cause the dragon to detonate on his target, resulting in a large explosion.
An edit from moi. My first attempt at editing ever. Mind you, I finally got photoshop and had it for about a couple of weeks. I JUST figured out how to appropiate used the brush/layers after 10 minutes of guessing.