Dragon Horn Pauldron

This single pauldron is made from the horn of a fallen dragon. While wearing it, you gain a +1 bonus to AC and have resistance to one damage type, which is determined by the kind of dragon that provided the horn, as shown on the table below.

Dragon Horn Resistance:

In addition, when you are subjected to an effect that allows you to make a saving throw to take only half damage of this resisted type, you can use your reaction to instead take no damage if you succeed on the saving throw.