Tbh i find it hard to believe that this is simply a coincidence. There is a big chance that this artist took Kishimoto`s design as a basis or at least was inspired by it. Unless they both drew some already existing mythological creature i just dont know about? Could be of course.
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.