Super Saiyan Transformation

Your Saiyan body transforms, applying new features to yourself, as you channel the power of the most legendary and mythical story of your species. Your transformation lasts one minute. You immediately gain five levels of exhaustion upon exiting the form after using it for the first time. Once you use this feature, you cannot do so again until you complete a long rest. Your abilities and attribute boosts are described below;

• Your hair changes to golden blonde, emitting bright light within five feet, and dim light for fifteen feet. This gives you, and any creature within twenty feet of you, disadvantage on stealth checks.
• Your Strength and Dexterity modifiers temporarily increase by one point awhile you are in this form, no matter what they were before. (Ex. A Strength modifier of +3 becomes +4. A Dexterity modifier of +5 becomes +6.) If either modifier are negative, they immediately become +1.
• Your alignment shifts towards evil and you become a more violent individual. (This is an important roleplay feature for this feat, you could have the character become more feral, or rude towards their allies. It is ultimately up to you to decide how to play your character though.)
• All slashing, bludgeoning, and piercing damage you do is considered magical for the purpose of overcoming resistance or immunity, even if it is with a non-magical weapon.
• You are resistant to all forms of damage that are not magical. You are vulnerable to psychic damage.
• Add your Strength score as extra bonus damage to any damage you do.
• You take three levels of exhaustion every time you leave this form, until you can master it. To master this transformation, you must spend one year training with it, or use the transformation at least ten times.