Required Wild Shape Mastery,  Must be a druid, and must be a subclass that is based on wildshape, like a circle of the moon druid.

Only selectable by druids, and they must be druids of the moon (or other wild shape based subclasses, or if DM allows it otherwise)

The druid has mastered their wild shape ability beyond that of normal druids and gain the following.

• The character's wildshape ability now lasts for an additional 4 hours.
• The CR rating in which the character can take shape of is increased by 3 but this can not exceed the level in the druid class.
• The character's intelligence and wisdom remain the same no matter their form.
• The character can understand any language they normally do no matter the shape they take, but can not speak  or cast spells with a somatic component  unless the form can speak a language.
• The Character gains 1 to an ability of their choice.