Glass Generation (グラス生成 Gurasu Seisei) is one of the special abilities of the Glass People.
The user summons forth glass which they can then manipulate.
Rags uses this technique in order to create a working glass Attack Ball for Hearts to travel to Earth, she later uses it to make a barrier to save Hearts from Jiren. Soon after she uses it to create her Glass Dragon to battle Piccolo and Android 17.
After absorbing Rags, Majin Ozotto tests this ability out by creating a large amount of glass.