Controlled Oozaru

Through your own experience with the Oozaru as well as your wisdom you've managed to be able to relatively speaking, tamed your Oozaru form. Whenever you become an Oozaru you retain your Intelligence, Wisdom and Charisma Scores, you can speak any language you have in the Oozaru form and you're able to control your Oozaru form. However, if you take enough damage to take you half your Hit Point total or below on each of your turns you must make a Wisdom Saving Throw DC of 20 minus your Proficency Bonus. Upon failure you lose control over yourself, and standard Great Ape racial rules apply.  

Additionally, your Oozaru form gains 2 attack actions, first one being a multiattack and a spell attack that can either use your Wisdom or Spellcasting Modifier to determine if it hits:

Multiattack. The Oozaru makes two Fist Attacks

Atomic Ki Blast (Recharge Equal to half your PB)- The Oozaru fires a massive blue beamed ki blast from their mouth. Ranged Weapon Attack: +1 +PB to hit, Range 200ft., One Target. Hit: 36 (8d8) Radiant Damage.