Elder Kai and Kibitokai in “Unfinished Business”

If Goku could gain control...If he could somehow wrap his mind around his new powers, then he would finally be able to ascend to a Super Saiyan 4.

Super Saiyan 4!? Well there's got to be something we can do to help him get there!

There is a method!

What is it ancestor?

Ahem. I'll let you know as soon as I think of it.