Dwarven Plate
Armor (Half Plate Armor or Plate Armor), very rare · 2024 rules, SRD 5.2
While wearing this armor, you gain a +2 bonus to Armor Class. In addition, if an effect moves you against your will along the ground, you can take a Reaction to reduce the distance you are moved by up to 10 feet.
Also in the 2014 rules (SRD 5.1).