Your Strength or Dexterity increase by +2, and your Constitution increases by 1.

Saiyans reach adulthood around 18 years. They have never died from old age due to their combative lifestyle so the longest they can live is still in question.

Saiyans tend to be chaotic in nature, yet some do lean towards lawfulness. 

Most stand between 5-7 feet tall.

Your base movement speed is 30 feet.

Flying speed equal to your movement speed. Once you drop to 1/4 of your hit points you can't use this trait until you heal above that threshold.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Resistant to bludgeoning damage due to your dense musculature. 

Your body needs twice as much food as others to maintain it's strength.

You hit harder with your unarmed attacks than most from your Strength. Your unarmed strikes deal an additional 1d4 damage at level 1, 1d6 at level 5, 1d8 at level 10, 1d10 at level 15, 1d12 at level 20.

When you are reduced to 0 hit points but not killed outright, on your next turn, make a DC 10 Constitution save. On success heal to 1 hp on your next turn. On a failure roll death saves as normal. You can’t use this feature again until you finish a short rest.

Starting at level 5, whenever you return to positive hit points after having dropped to 0 hit points that wasn't self inflicted, you gain temporary hit points equal to twice your level and the next attack of yours that hits before your next long rest, deals additional bludgeoning damage equal to your level.

Starting at level 7, as a bonus action, you can transform into a Super Saiyan for one minute and gain +2 to your Strength, Dexterity, and Constitution scores, allowing you to exceed your maximum. You can end this transformation as a free action. This form may be entered twice at level 14, and three times at level 20 per long rest.

At level 14, once per long rest, as a bonus action, you can enter the Super Saiyan 2 form if you are currently in the base Super Saiyan form for one minute and increase your Strength, Dexterity, and Constitution scores and maximums with +4 points. You can revert to your previous form as a bonus action or end the transformation as a free action. You can enter this form twice at level 20.

Super Saiyan 3 is the third form of Super Saiyan and the successor to the second transformation. This form extracts every drop of potential from a Saiyan's blood. At level 20, once per long rest, as a bonus action, you can enter the Super Saiyan 3 form for 1 minute if you are currently in the Super Saiyan 2 form and increase your Strength, Dexterity, and Constitution scores and maximums by +6 points and attacks against you will have disadvantage. You can revert to your previous form as a bonus action or end the transformation as a free action. Suffer 1 point of exhaustion after you revert back to your base form.