Boon of the Doppleganger's Insight

You can anticipate the actions of others, adapting to their moves before they act. 

Properties:

• Once per round, you can use your reaction to impose disadvantage on an Attack Roll, Ability Check, or Saving Throw made by a creature within 30ft. 
• Gain a +1 bonus to your AC when fighting creatures of the same type as yourself.

FROM THE MIND OF ALEC LACHMAN