Evil Super Saiyan Blue

Evil Super Saiyan Blue is a form attained as a result of gaining control over the power of evil that runs berserk or an Evil Saiyan who can able to turn Super Saiyan Blue.

Appearance
Compared to the Berserk Super Saiyan Blue, Vegeta's Blue aura and Evil Aura switch positions, so that the outer aura is a vibrant blue (signifying control over the Evil Aura). His eyes gain dark line and his body radiates both dark lightning as well as the blue lightning first displayed by Super Saiyan 2. Additionally, his skin takes on a yellowish hue reminiscent of his Evolved form and his eyes gain visible black pupils with

Usage and power
In Cumber's words, this form is what happens when a Saiyan controls the Evil Aura into the Evil Saiyan Form. When achieved for the first time, the user's power receives a tremendous boost, though like most forms, an inexperienced user will struggle to maintain the form for very long. However, it can be trained extensively to eliminate this weakness.

During the New Space-Time War Saga, in the midst of his battle with Cumber and Turles, Vegeta is affected by the Evil Aura once more, with Turles declaring that he should accept the Evil nature of the Saiyans, but after a moment of self-reflection, Vegeta overcomes it and controls the dark energy for himself, declaring that the true Saiyan nature is to keep fighting and to keep pushing for further strength, resulting in his controlled transformation and pushing his power to an astounding level. He then easily defeated both Evil Saiyan Turles and Super Saiyan 3 Full Power Cumber. Later, he attempted to attack Super Saiyan Rosé Crimson-Masked Saiyan with a Galick Gun, but reverted to his base state exhausted due to his lack of adjustment to the form.

When hearing of Vegeta having not adjusted to his new form yet, as well as Goku having not mastered Ultra Instinct, Shroom and his fellow former Demon Gods offered to transport him and Goku to the "Mock Hyperbolic Time Chamber" in order to give them time to refine their forms. After training within the dimension, Vegeta uses the refined power of Evil Super Saiyan Blue alongside Ultra Instinct Goku to battle against the Super Saiyan Rosé 3 Crimson-Masked Saiyan, after he bests the Warrior in Black.