Slashing Surge

You've learned where to cut to have the greatest results, granting you the following benefits:

• +1 bonus to attack and damage rolls made on the first turn of combat.
• Once per turn when you hit a creature with an attack that deals slashing damage, you can reduce the speed of the target by 10 feet until the start of your next turn.
• As your bonus action you can bring back your slashing weapon with great force dealing additional 1d6 damage. 
• When you score a critical hit that deals slashing damage to a creature, you grievously wound it. Until the start of your next turn, the target has disadvantage on all attack rolls.