Sparkling Targe

You've studied the applications of magic, training yourself to perform not just offensive maneuvers but defensive tactics as well. When magic flows through you, your shield can block impossible things, even a dragon's breath or a Force Barrage.

You gain the Shield Block general feat.

When you're in Arcane Cascade stance with your shield raised, your circumstance bonus to AC from your shield also applies to your saves against spells and other magical effects. In addition, damage you take from a spell or other magical effect while you're in Arcane Cascade can trigger your Shield Block reaction, even if the damage isn't physical. When blocking damage from a magical effect in this way, increase your shield's Hardness by an amount equal to the resistance you have from Arcane Cascade. These benefits apply whether you're using an actual shield, the shield spell, or something else that works like a shield (such as a raised tome if you have the Raise A Tome feat).

Conflux Spell Shielding Strike

Studious Spells 7th: Resist Energy; 11th: Warding Aggression; 13th: Mountain Resilience