Evol's red, navy, gold, black and white-coloured upgraded Evolution form, known as Phase 4: Perfection, themed after a cobra, astronomy and a black hole, accessed using the Cobra and Rider EvolBottles as well as the Evol-Trigger, this was Evolt's natural form before he was sealed away by Vernage. The power of this form is greatly increased in comparison to his other forms, beating out Grease, Rogue, Cross-Z Magma and Build's RabbitRabbit/TankTank Forms. In this form, Evol is armed with the Transteam Gun, as well as being capable of teleportation, superhuman speed and psychokinesis, as well as the ability to generate and control black holes. This form debuts in Episode 36 of Kamen Rider Build.

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