Arcane Mirror

Alter: This mirror-like shield is enchanted with abjuration magic that can reflect spells back at its source. While holding the shield, you can use it as a reaction to cast the shield spell from it. Once this property has been used, it can't be used again until you finish a short or long rest.

The shield has 10 charges and regains 1d6+4 charges each day at dawn. When you succeed on a saving throw to resist the effects of a spell that targets only you or are missed by a spell attack, you can use your reaction to learn the level of the spell (if you reflect a spell that would cause you to take half damage on a success, you take none instead). As part of your reaction, you can expend a number of the shield's charges equal to the spell's level (up to 6th) to reflect back at its source. When you reflect a spell in this way (no higher than 6th level), the caster of the spell must make a DC 16 Dexterity saving throw. On a failed save, the target takes 1d8 radiant damage for each expended charge, as a bolt of reflected energy hits them. On a successful save, the damage is halved.

Attunement: yes
Rarity: Very Rare
Type: Shield
Cost: 25650gp

Griffons Saddlebag, Vol 1