Armour of Spell Reflection

With this magical breastplate, you can reflect spells back at a caster once per day, and once per day you can use an action to force any creature within 5 feet of you to make a STR save DC 15 or take 2d10 force damage and be knocked back 20 feet.

This armor consists of a fitted metal chest piece worn with supple leather. Although it leaves the legs and arms relatively unprotected, this armor provides good protection for the wearer's vital organs while leaving the wearer relatively unencumbered.