Power of the Hill Giant of Grolantor

You’ve manifested some of the power of a hill giant of Grolantor, granting you the following benefits:

Ability Score Improvement. Increase your Strength and Constitution by 1, to a maximum of 20.

Fearless. You have advantage on saving throws against being frightened.

Grolantor's Madness. As a bonus action, you can grow to the size of a hill giant. Apart from a few scraps of clothing, which change size with you, any equipment you are wearing or carrying merges with your new form. While in this form, you gain the following benefits:

• You become Huge, if you weren't already Huge or larger.
• You have a base AC of 13 + your Dexterity modifier.
• Your walking speed increases by 20 feet.
• You have advantage on Strength checks and Strength saving throws.
• You are immune to the frightened condition.
• You are immune to confusion spells and similar magic.
• Your unarmed strikes have a reach of 10 feet and deal 3d8 bludgeoning damage.
• You gain a bite attack, which uses your Strength modifier for attack and damage rolls made with it. On a hit, the target takes 3d6 piercing damage, and you regain hit points equal to the damage dealt.

However, on each of your turns while in this form, you must use all of your movement to move towards the nearest creature. Immediately after moving, you must roll a d10 to determine your action:
    1–3. You make three unarmed strikes against one random target within your reach. If no other creatures are within your reach, you fly into a rage and gain advantage on all attack rolls until the end of your next turn.
    4–5. You make one unarmed strike against each creature within your reach. If no other creatures are within your reach, you make one unarmed strike against yourself.
    6–7. You make one attack with your bite against one random target within your reach. If no other creatures are within your reach, your eyes glaze over and you become stunned until the start of your next turn.
    8–10. You make three attacks against one random target within your reach: one attack with your bite and two unarmed strikes. If no other creatures are within your reach, you fly into a rage and gain advantage on all attack rolls until the end of your next turn.
    After taking this action, you can use your bonus action to attempt to revert to your normal form by rolling a d6: on a 1–4 you remain in this form; on a 5–6 you revert to your normal form. While in this form, you can only use your reaction to make an opportunity attack.
    A creature within 10 feet of you, can use their action to make a Charisma (Persuasion) check (DC 15 - your Wisdom modifier). On a success, you can revert to your true form at the start of your next turn.