Treegenerate

You reawaken the true nature of the wood you stand on. As an action, you touch a piece of wood and cause it to grow new branches in a form of your choosing anywhere along its length, as long as it's from the same tree. Regardless of the form it takes, the awakened shape cannot exceed a 5 foot cube. The location where the growth is located is difficult terrain for all creatures other than you, and after casting the growth cannot change its shape.