Runic Reprisal

When you Raise your Shield, you can bury a runic trap into it, which is set off by the clash of an enemy weapon. When you use Fortifying Knock, you can Trace a Rune with a damaging invocation on your shield, even if it normally couldn't be applied to a shield. The traced rune doesn't have its normal effect, instead fading into your shield. If you Shield Block with the shield against a melee Strike, you can Invoke the Rune as part of the reaction, causing the rune to detonate outward and apply its invocation effect to the attacking creature.