armor of focusing

the armor has 3 charges, and it regains all expended charges daily at dawn. while wearing the armor, when making a wisdom, charisma, or intelligence saving throw or skill check you can expend 1 charge too gain advantage.

The breastplate and shoulder protectors of this armor are made of leather that has been stiffened by being boiled in oil. The rest of the armor is made of softer and more flexible materials.