After a long fight with Zamasu and Goku Black, they were finally pushed to their edge. All of a sudden they fused and a loud, feminine voice comes from a large pillar of light, of the newly fused Zamasu

“My form is justice… and my form is the world. Worship me. Give praise unto me. Me, the beautiful, the sublime. Me, the invincible, the almighty and divine! All hail Zamasu!”

She says with a superior grin