Gentleman’s Umbershield

Wand, spellcasting focus, rare (requires attunement)
  Rain, arrows, or maces, this wand can deflect it all. Disguised as an oiled blue silk umbrella, as any gentleman might carry, this magical implement gives you a heightened sense of danger. While attuned to the wand, you have advantage on initiative rolls.
  This wand has 20 charges, and regains 1d10 + 10 charges daily at midnight. When you are hit by an attacker you can see, you can use your reaction to open the umbrella. Roll a d10. You expend as many charges as rolled on the d10, or as many as remain in the wand, whichever is lower. Until the start of your next turn, your AC increases by the number charges expended. If this stops the attack hitting you, the weapon or missile bounces back at its origin using the original attack roll, potentially causing the attacker to hit itself.
  Uncommon variant: Reduce the maximum charges to 12, regains 1d6 + 6, and decease the d10 to a d8.
  Very rare variant: Increase the maximum charges to 30, regains 3d6 + 12, and increase the d10 to a d12.