(You are Goku in Super Saiyan Blue Kaio-ken X20 form)

In the Tournament of Power, you and Vegeta fighting Jiren in their base form, but they have no choice but unleash their full power

Vegeta: Kakarotto, we can't fighting him in base form, use your Super Saiyan Blue Kaio-Ken X20 thing! Now! Vegeta tranform to Super Saiyan Blue Evolution