Reactionary

You gain a number of Reaction Charges equal to your proficiency bonus. You may use a reaction to expend on of these Charges to do one of the following:

• You gain two additional reactions.
• You gain a bonus to your AC equal to your Dexterity Modifier.
• When you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail. The effects last until the beginning of your next turn. You cannot use more than one Reaction Charge per round, and you cannot choose multiple of the same reaction per round.