Shatter Shield

General Feat (Prerequisite: Access to Shield Spell, Spellcasting ability 16+)

You gain access to the following ability a number of times equal to your proficiency bonus per Short Rest.

When casting shield, you may choose to upcast it to 2nd level, gaining the following effect: the first attack to be stopped by the shield shatters it, reflecting the energy back at the attacker instead of dissipating it. The attacking creature receives half of the damage from their own attack and must make a dexterity saving throw using your spell DC. On a success, nothing further happens. On a failure, they are pushed 5ft directly away from the user.