Krrr, the Omniform

If Krrr, the Omniform is your commander,
choose a color or combination of colors before
the game begins. Krrr, the Omniform is the
chosen color or colors.
You may have Krrr, the Omniform enter the battlefield as a copy of any creature on the battlefield, except its name is Krrr, the
Omniform, and it's legendary in addition to its
other types.