You have trained hard in the way of the sword,  you are proficient in its use and gained a few abilities the sword can be used for.

- You have trained so hard that each swing you make represents the sweat, blood, and tears you have put into your training, you gain a +5 to your attack rolls and damage.

At level 11 you have learned the best way to wield your sword for the most devastating hits

- your axe now crits on 18 instead of 20