Armor of Thorns (Z)

Armor Class: 18 - Stealth: Disadvantage
Constitution: +2 up to a maximum of 22.
While wearing this armor, once per turn, when
a creature hits you with a melee attack, you may
cause the armor's spikes to deal 1d6 piercing
damage to them.
Additionally, you may use your reaction to
reduce the damage from a creature's melee attack
by the amount of damage dealt by your spikes.
Requires Attunement — Zenith Artifact