Saiyans have been warlike over their history, fighting and conquering and struggling to survive. The tools needed for success became passed down by blood, and as such: saiyans have their Constitution score increased by two; depending on their clan and background, their Strength or Dexterity score might be raised by one.

Saiyans are a mobile race, quick and ready to move at all times. Their instincts and preparedness for combat lends itself well to their athletic pursuits, giving them an edge over their competition. Saiyans are proficient in either the Athletics or Acrobatics skill.

Saiyans have a dense musculature and strong frame, enabling them to shoulder heavy loads many others can't. You count as a size larger when determining your carry, drag, push, and lifting weights.

The dangerous shapeshifting nature of the saiyans reveals itself when they come into contact with the light of a full moon. It triggers a hidden reaction, enlarging and shifting their anatomy into that of a massive and imposing Great Ape. They stand almost thirty feet tall and weigh several tons, having a baboon-like face with sharp fangs and thick, rough, coarse fur a dark brown in color. Their might becomes incredible, and their organs that might seem out of place normally are finally able to function properly, enabling them to breathe out a blazing gout of flame. But the transformation is difficult to control, and it takes much experience to master; most saiyans never do, and are almost feral while transformed.

While the light of a full moon can trigger the transformation, similar sources of light can as well. Saiyan mystics refer to the necessary wavelength as Blutz Waves, and these have been generated unintentionally by such things as a smooth bald head, and intentionally by spells, even something as simple as a specific variation of the Light cantrip.

When outside and viewing a full moon or similar light source, you must make a Wisdom saving throw(DC 15). If you fail, with an action you transform into an Oozaru, becoming Huge in size for 1 minute, with your speed becoming 20. Your weapons and equipment become part of the form, and your unarmed attacks are treated as weapon attacks and gain the siege property, and use the damage die of the melee weapon you wielded, but still deal Bludgeoning damage. In the form you also have advantage on Strength checks and Strength saving throws, and disadvantage on Charisma and Wisdom saving throws; you have resistance to non-magical bludgeoning, piercing, and slashing damage; when you make a melee attack using Strength, you gain a bonus to the damage roll that equals your STR mod. If you are able to cast spells, you can’t cast them or concentrate on them while in this form. If your turn ends and you haven’t attacked a hostile creature since your last turn or taken damage since then, you become Incapacitated with confusion and rage until the start of your next turn or you take damage. The form also ends if you are reduced to 0 HP or less, or if the moon becomes completely obscured, or if your tail is removed; it can't be used after ending until a long rest is taken.

At level 10, you can spend 48 hours training to master the form; if you do so, you are no longer Incapacitated when you haven't attacked a hostile creature or taken damage since your last turn, and you can cast spells with a range of Touch or Self.

Tail

Necessary for the transformation is a saiyan's tail, which is monkey-like, prehensile and furry, and reaches down to their calves. It can be used to pick up objects weighing up to 5 pounds and interact with them, even including fine interactions(that don't use multiple fingers, of course), but it doesn't quite have the strength to directly damage another creature, or to wield a shield or weapons. If the tail is lost, it can be restored with a Wish or Regeneration spell(if it is still present).

If the tail is lost, during the first week there is a 5% chance every dawn that it will grow back naturally, which will happen over the course of a week. But, if a regrown tail is lost, there's no chance for another one to grow back naturally.

It's hard to keep a good saiyan down. Their pride is only matched by their resilience, making them able to keep coming back, and to return stronger than ever before after overcoming severe injuries. Their health and vigor has astounding potential, but it takes grueling training to draw it out.

After being reduced to 0 or fewer HP and succeeding on a death saving throw or regaining HP, gain 1d4 bonus maximum HP and increase either your Strength score & max or Dexterity score and max by 1 after finishing a long rest. Strength and Dexterity maximums cannot be increased by more than proficiency total times each or above 30, or any increase more than once after a long rest.

After enduring grueling training and unimaginable hardships, fueled by their emotions, saiyans can elevate their normal form pasts its usual limits. They transform, becoming more muscular, their irises changing color and their hair being lifted up with an otherworldly golden light. This is what is called by some a Super Saiyan, where all the potential of the race is brought to the fore: the senses and instincts of a saiyan become sharpened, their power unleashed with explosive fury- this is what it means to go further beyond.

If you are at least Level 10 and have at least five Full Recovery boosts, you can spend an action to elevate your form and become a Super Saiyan. For one minute, you gain:

• Full Recovery Dexterity boosts+Proficiency movement speed.
• Full Recovery Strength boosts extra damage on an attack or spell once a turn.
• Full Recovery boosts divided by 2(round down) bonus to attacks rolls.
• Once during the transformation, resist death and stay at 1 hit point after being reduced to zero or fewer.

You gain 1 level of Exhaustion after leaving the form. It ends if you're incapacitated or reduced to zero hit points or fewer, or as a bonus action during your turn. After you use this transformation it can't be used again until you finish a short or long rest.