Opportunist Warrior

You have achieved a precision in combat, granting you the following benefits:

• Increase your Dexterity or Intelligence by 1, to a maximum of 20.
• If you are holding a finesse weapon in one hand and the other hand is free, when you do an attack of opportunity using your finesse weapon as a reaction, you can do a number of additional attacks of opportunity using that weapon equal to half of your Dex or Int modifier rounded down (whichever is higher) until the end of your turn.
• You can take "Opportunist's parry stance" as an action. When using this action, until the beginning of your next turn, your AC will be increased by 1 and whenever a creature within your weapon's range does an attack against you and misses, you can make a weapon attack on that target using your finesse weapon. You can use this action a number of times equal to your proficiency modifier. You regain all expended uses of it when you finish a long rest.