When you use Guarded Strike while wielding a Shield, and you make your attack with a weapon other than that shield, you increase the DR granted whenever you use the Shield Block ability by +3 per Tier until the start of your next turn.
When you use Guarded Strike and Hit or Critically Hit with the attack granted by the ability, you can spend 1 charge of Inspiration to gain a +2 Bonus to the attack’s damage roll.