I spared you the three periods, Beerus is the last major villain not to have a transformation. Think about all the saga villains in loosely canonized dragonball:
Zamasu -> Fusion Zamasu
Frieza -> Gold Frieza
Syn Shenron -> Omega Shenron
Hell Fighter 17 -> Super 17
Baby . . . . . Golden Ozaru...
Have pressing Dragon Ball questions you need an unqualified answer to? Wondering what a married father of two is doing at a seedy place like this? Want to know more behind "the laugh?" Then ask away!