Silencing Blow

You've learned to place your blows in particular places to bring advantages to yourself and your allies. You have gained the ability to attack silently. You gain the following benefits:

• Before you make an unarmed strike, you can choose to take a -5 penalty to the attack roll. If the attack hits, you can either add +10 to the attack's damage or silence the creature until the end of their next turn.
• All attacks made with your fists are silent.