a pair of black energy hessians

Object 'a pair of black energy hessians' is type armor, material black energy.
Extra flags: glow hum evil.
Weight is 10, value is 3, level is 51.
Armor class is 10 pierce, 8 bash, 8 slash, and 14 vs. magic.
Affects damroll by 2.
Affects savingmaled by -4.
Affects savingspell by -1.
Affects savingmental by -2.
Unique item.