The true Istari

[Morsul the Dark]

I agree it's a focus thing..Its like a storm lightning crashing every where...however Gandalf(and the other isatari) have a simliar thing their power is strong and like lightning their staff is like a lightning rod it send the magic where they want and also I blieve like the one ring they can put some of their power into the staff like in moria so he doesnt have to continuaslly conetrate on making like heputs the spell into the staff and voila light and he can concentrate n where he's going