Azure Banded Plate Armor

This finely made suit of azure banded armor has a dark symbol of a keep on the front and back

Object 'azure banded plate armor' type armor, extra flags magic.
Weight 30, value 35721, level 250.
Object Quality (1000 / 1000 hps)
Armor class is 51.
Modifies save vs spell by -5 continuous
Modifies damage roll by 13 continuous
Modifies hit roll by 10 continuous
Modifies armor class by -50 continuous