Plate of the Magehunter General

Armor (breastplate, half plate, or full plate), very rare (requires attunement)
  Made of a dark grey, lead-rich metal, this plate seems especially dull around magical sources of light.
  Absorption. When you are subjected to a magical effect that allows you to make a saving throw to take only half damage, you instead take no damage on a success and only half as much damage on a failure. The metal of the armour hums with the absorbed energy; once you have used this property 3 times, you can’t do so again until you finish a long rest, after which time the absorbed energy dissipates.
  Spellbreak. While wearing this armour, acid, cold, fire, lightning, and thunder damage you take from magical sources, as well as magical healing you receive, is reduced by 3. In addition, whenever you are hit by a magical melee weapon, the attacker must roll a d20. On a 10 or lower, the weapon’s magic is suppressed for 1 hour, causing it to temporarily become mundane.
  Uncommon variant, Plate of the Magehunter Sergeant: Reduce the number of uses of ‘Absorption’ to 1 per long rest. Remove the ‘Spellbreak’ effect.
  Rare variant, Plate of the Magehunter Captain: Reduce the number of uses of ‘Absorption’ to 2 per long rest. Remove the effect from ‘Spellbreak’ that can suppress magical weapons.