Needler

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

• Increase your Strength or Dexterity by 1, to a maximum of 20.
• Once per turn, when you hit a creature with an attack that deals piercing damage,you can decrease this creature's speed by 10ft.
• When you score a critical hit that deals piercing damage to a creature, you critical wound it. Untill the start of your next turn the creature has disadvantage on all attack rolls.