Druid Grovetender

You have grown in the powers of nature, and your abilities have grown with you.  You have achieved the rank of grove tender, and can hear the voices of nature as you pass over the land.  You are under the constant effects of Speak With Animals and Speak With Plants.  You can cast Commune With Nature twice a day without using a spell slot.

You can now use your wild shape abilities to change into a treant.  While in this form, no form of plant life will attempt to cause you damage.  You can cast all spells known to you while in this shape.