Super Saiyan

A Super Saiyan was a being told in legend by the Saiyans, that is until Goku turned into one in his fight with Frieza. The original legendary Super Saiyan was said to have destroyed his planet, not being able to control his power. This form can be achieved at the rage of a fallen comrade who died at the hand of your enemy. It can also be achieved if you push yourself to the limit and power up greatly. However, despite being called a legendary transformation, it was easily overpowered during the Android Saga. Many forms exist of Super Saiyan, the form succeeding this is Super Saiyan 2, also called Ascended Super Saiyan. Many have achieved this form besides Goku including Vegeta, Gohan, Goten, Trunks, Future Trunks, and a variation of the form called the Legendary Super Saiyan which was achieved by Broly.

Appearance
The user of the transformation gets golden hair and it sticks up, sparks of lightning surging through their body. Their eyes also turn from black (the usual color of a Dragonball Z character's eyes)  to green. Energy surges through their body and their power level increases dramatically from that of their base form. Muscle mass may increase also. They get a golden aura instead of a white aura when they first go Super Saiyan.