The Stoneguard are an elite group of military personel. Their protection of the Irradia living in the Great Divide make it one of the safest places to live in the United States. When you take this feature you gain the following abilities.

Parrying Stance

When wielding a longsword in one hand and nothing in the other, or wielding a longsword in two-hands, you can parry melee attacks made against you. As a reaction when you are hit by a melee weapon attack, you can reduce the damage by an amount equal to the damage die of your weapon + your Dexterity modifier + your Tier.

If you reduce the damage to 0 and your attacker is within 5 feet, you can make an attack against them, as part of the same reaction.

Total Disruption

Your sheer will allows you to enter a dead calm state, where you can see through any attack, your instincts allow you to avoid all possible damage. When you are hit by a melee weapon attack, as a Reaction you can cause that attack to miss.

You can use this ability a number of times equal to your proficiency bonus, and regain your uses after completing a long rest.

Slashing Wind

When you take the Dodge action and an opponent misses you with an attack, you can take the Attack action using your reaction against that creature.

You can use this feature a number of times equal to your proficiency bonus, and regain your uses when you finish a long rest.

In addition, when you take the Dodge action, you can make a melee weapon attack with a longsword using your bonus action.

Perfect Parry

Once in each round when you are hit by a melee weapon attack, you can force the attacker to reroll the die, choosing the new result. You can't use this feature on the same turn you have used your Parrying Stance feature.