These are all I think not tested yet.

If the sphere is smaller then the character mesh,hidden in the body. dynamic cloths would work.

 

If the sphere is bigger then the body .

out side the body.

If you could group the sphere a deferent name.

witch I am assuming you can not it would work.

 

Is the sphere smaller hidden or larger where ya could see it then the body ?

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Dark Sphere Mage Vengeance