Blur

Blur was an illusion spell that made the contours of a caster "blurry".

Effects
When under this spell, the caster would become harder to hit as they did not appear to have a solid form any more. Attacks made against a blurred caster by someone who couldn't see it ignored this spell, of course, as they couldn't see the effect.

Components
The older versions of the spell needed verbal and somatic components, but the later version only needed a verbal component.