Penetrating Strike

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 and surpass the creatures AC by 5 with an attack  that deals piercing damage, you can automatically hit an adjacent creature behind it for half damage.
• When you score a critical hit that deals piercing damage to a creature, you can do full damage to the additional creature.