Black Knight's barding

This gear used to be worn by the personal horse of the Black Knight during his reign of terror. Pitch-black, it appears to be made not only of some strange black steel, but also of entire plates of black diamond! Naturally, such a weight of metal and stone cannot be good for the mount's speed. However, it offers not only mundane protection against blows; the adamant bears an enchantment that makes its wearer partially undead.

A black horse barding

+10 centaur barding

Ponderousness ego
Hunger--
rN+
Evil

Desirability

It's your choice whether excellent AC, reduced hunger, and a rank of life protection are worth losing a bit of your centaur's speed advantage, but they probably are.