Opportunist

Through vigorous training and focus you’ve learned to read your opponents body language to anticipate their actions and have honed your reflexes to counterattack instinctively.  

At 3rd level when you take this expertise, you may make an opportunity attack without using a reaction if you are wielding a weapon in one hand and a shield or no weapon in your off hand. This can be done once per turn.

If a creature uses the Disengage action, you may take an opportunity attack using your Reaction.

Engagement

At 3rd level when a creature moves into your attack range with your melee weapon you may take an opportunity attack.

Nimble Riposte

At 7th level when a creature makes a melee attack against you and misses you may take an opportunity attack with your melee weapon.

Cleaving Rush

At 10th level when you make a successful hit on an attack you can use your momentum to attack another creature within melee range. The second target does not take your bonus damage.

Greater Response

At 15th level you choose one Great Weapon you are proficient with and you master it’s use. If wielding this particular Great Weapon you make take your opportunity attacks.

Cleaving Tornado

At 18th level when you make a successful hit on an attack you may make a full spin to attempt a second strike on the same creature. Any other creatures within 5ft are hit using the original attack roll if it beats their AC.  The second strike against the original target requires another attack roll