Frostgrave - Chevaliers Spectraux

Wraith knights are the most powerful creations of the Lich Lord. They appear to be suits of heavy armour containing nothing but a black emptiness and a pair of burning eyes. Although capable of some independent thought, they are unfailingly loyal to the Lich Lord and are thus immune to control by any other spellcaster. Protected by the Lich Lord's magic, wraith knights can only be harmed by magic attacks.