Enspelled Armor

Armor (any), very rare (requires attunement)

Lore. High-ranking officers in the armies of both sides in the Divine War often wore suits of enspelled armor, using its magic to provide a last-ditch defense or escape mechanism.

Powers. During a short or long rest, any spellcaster can cause the armor to absorb one spell of 3rd level or lower with a casting time of 1 action or less. You must be conscious and willing to permit the armor to receive the spell. Thereafter, until the next dawn, while wearing the armor, you can use your action (or whatever the casting time of the spell) to cast the spell contained in your armor. In addition, while you wear the armor you gain a +1 bonus to your AC.