Evolto Black Hole Form is the final, most powerful transformation of Evolto in Kamen Rider Build. As the true identity behind Kamen Rider Evol, he serves as the series' primary antagonist and a destructive alien lifeform seeking to consume Earth. In this form, he gains immense strength, gravity-based abilities, and overwhelming combat power, making him one of the most dangerous threats in the story. He plays a central role in the climax of the series.