opportunist

you learn to wait and strike at the right moments, you gain the following benefits:
-you gain a +1 to your dexterity score to a maximum of 20.
-you gain an additional 4 reactions, this brings you to a total and maximum of 5.
-you gain the protection fighting style which you can use with a shield, a simple weapon, or a martial weapon.
-if you ready your action to attack a creature you can attack twice if you have the extra attack feature.