Ruinous Blow
Prerequisites Level 5 Vagabond
When you hit a creature with an attack using a weapon or Unarmed Strike, you can expend two Battle Dice as a Bonus Action to sunder its defenses. Add the Battle Dice to the attack’s damage roll. The target has a -3 penalty to AC until the end of your next turn.
Sources
Valda’s Spire of Secrets Extras (2024)