Extra Attack
Starting at 6th level, you can attack twice, instead of once, when you take the Attack action on your turn. Moreover, you can cast one of your cantrips in place of one of those attacks.
Warding Roots
Beginning at 10th level, you can extend your primal blessings to protect your allies. When any ally starts their turn within 30 feet of your Guardian Form, that ally also gains the temporary hit points granted by your Guardian Form.
While Guardian Form lasts, you and any allies that have been granted temporary hit points from your Guardian Form can ignore the damage and negative effects (such as difficult terrain or being restrained) from spells you cast that magically create or manipulate plants, such as those created by the *entangle* or *spike growth* spells.
In addition, you gain a bonus to any Constitution saving throw you make to maintain your concentration on a spell. The bonus equals your Wisdom modifier (minimum of +1).
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Primeval Champion
By 14th level, your guardian form starts to resemble treants, the grove guardians of old. When you activate your Guardian Form, you can grow by one size category, from Medium to Large, for example.
Additionally, while in your Guardian Form you are resistant to all bludgeoning, piercing, and slashing damage.
Finally, you gain the ability to twist and turn the ground beneath you. While in your Guardian Form, the ground within 30 feet of you is difficult terrain for your enemies.