Armor (shield), rare
This buckler shield is reinforced with adamantine, one of the hardest substances in existence. While you are wielding it, when you or an ally within 5 feet of you suffer a Critical Hit, you can spend your reaction to make it a Normal Hit. The decision to use the shield must be made after the critical hit is rolled but before damage is rolled.
Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.
Notes: Combat, Warding