That is not correct, range self means it targets the caster, even if it can include other targets.
Dragon breath is a good example from JC, as it targets both the creature that gains the breath weapon and the creatures caught in the exhalation.
Self (Xft) is the template for point of origin and is used for AoEs, and the blade cantrips for some reason.
Shadowblade targets the caster and forms a blade in hand, it also targets enemies struck by the blade.