In 2020, Kaisa Natron released his first song "Butterfly Zkillz" on the Euro Chatal Records label. Not much was known about the rapper, who wears a balaclava and often pixelates the people around him in his videos. His lyrics revealed that he comes from the Mümmelmannsberg housing estate in Hamburg, a social hotspot. In 2021, the songs "Kleine Line Coke" and, together with rapper Kolja Goldstein, the single "Kokain Milieu" followed. His street rap is recognizable by its monothematic focus on drugs and violence. The second collaboration with Kolja Goldstein , "Butterfly", was also very popular in the scene, as was the joint track "Skimaske" with AchtVier, a former member of 187 Strassenbande. With the feature on the Haiyti song "Jil Sander", he made an excursion into the Hamburg artist's more experimental trap at the end of 2021.
