Shield Wallop

Attacks with your shield knock the sense out of your foes. Make a shield bash, Shield Boss, or Shield Spikes Strike. If you hit and deal damage, the target is Stupefied 1 until the start of your next turn (Stupefied 2 on a critical hit). If your shield is a Tower Shield, Fortress Shield, or another shield that grants a higher circumstance bonus to AC when you Take Cover behind it, the creature is instead stupefied 2 if you hit and deal damage to it (Stupefied 3 on a critical hit).