Guardian of Nature

4th-level transmutation
Casting Time: 1 bonus action
Range: Self
Components: V
Duration: Concentration, up to 1 minute
A nature spirit answers your call and transforms you into a powerful guardian. The transformation lasts until the spell ends. You choose one of the following forms to assume: Primal Beast or Great Tree.
Primal Beast. Bestial fur covers your body, your facial features become feral, and you gain the following benefits:

• Your walking speed increases by 10 feet.
• You gain darkvision with a range of 120 feet.
• You make Strength-based attack rolls with advantage.
• Your melee weapon attacks deal an extra 1d6 force damage on a hit.

Great Tree. Your skin appears barky, leaves sprout from your hair, and you gain the following benefits:

• You gain 10 temporary hit points.
• You make Constitution saving throws with advantage.
• You make Dexterity and Wisdom-based attack rolls with advantage.
• While you are on the ground, the ground within 15 feet of you is difficult terrain for your enemies.