God of War's Realm Shift FX on UE4?

Hi,

I’ve been trying (failing, really) to make an effect like Realm Shift, in God of War:

Source: Mathewmatosis, (minute 11:25)

It’d serve different purposes mechanically, but I wanted something among those lines for a sphere effect, visually.

Does anyone know the proper way to start something like that? Any tips?
I apologize if these are simple questions, I’m really more of a programmer than an artist.

Thanks a lot.