When you imbue your weapon with arcane energy, you can expend illusory power to become blurry.

Prerequisite(s): Arcane Strike, Spell Focus (illusion), 1st-level Eldritch Knight

Benefit: When you activate your Arcane Strike feat, you can expend an unused illusion spell that you have prepared or a spell slot of a level in which you know at least one illusion spell (for spontaneous casters). If you do, you gain 10% concealment per level of the illusion spell expended until your arcane strike ability ends on your next turn.