Iaido Mastery

You have mastered Iaido weapons and have mastered the ability to fight while your weapon is still within its sheath. You gain the following benefits:

• you gain +1 ac when your weapon is sheathed
• when you have one iaido weapon  in your hand other creatures provoke an opportunity attack from you when they enter your reach
• Before you make an attack with an iaido weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.