Because of your wooden flesh, you gain a natural base AC of 13. You also gain resistance to piercing and bludgeoning attacks, but weakness to fire.

You gain proficiency in a skill of your choice. You also have a natural affinity for plants, granting you advantage when rolling nature checks. When touching a plant, you have the ability to roll a nature check to learn more about it (what plant it is, how much longer it has to live, ect)

At level 3, you gain the ability to spread your roots with your hands and feet through a surface as a bonus action (assuming the surface is dirt or sand, or that it has enough cracks or space to do so), granting you better grip and/or stability. While you are rooted, attacks that would normally move you up to 15 feet or give you the prone condition will not have this effect, and you can now roll (with advantage) to not be moved by attacks that would move you more than 15 feet. You can also use this while climbing on certain surfaces or while holding things to improve your grip, preventing you from being disarmed or knocked off of whatever surface you are climbing on. By controlling your roots, you can also alter your body in very small ways (growing your fingers to form letters or symbols, making small, thin spines appear on your body, etc)

At level 7, you gain and ability score increase of +1 to your Wisdom, Strength, or Constitution.