Ultra Ego is an extremely powerful transformation used by Vegeta that utilizes the Ultra Ego ability and the power of destruction.
Ultra Ego was created by Toyotarou, and added to the story after Toriyama greenlit it. The name was chosen to be in line with Ultra Instinct’s names and also to fit with Vegeta. Vegeta’s appearance in the form was based off Beerus, as he is also a user of Ultra Ego himself. He also depicted it and Ultra Instinct as Yin and Yang.
This state is attained by one who has received a proper God of Destruction training and has gained the ability to use the powers of one. However, the state can only be utilized when the user is in the right mindset to act as a Destroyer. Vegeta at one point during his fight with Granolah described the form as a polar opposite to Ultra Instinct. A user of this state gains the power of destruction.