Voidwalker

inspired by my World Of Warcraft (WOW) times, when I played a warlock. The voidwalker was the second minion that a warlock could summon.

Voidwalkers are a type of void creature. Large shapeless things in hues of blue and purple, they hover ominously. Despite being fleshless, they do have souls.

Although they aren't demons, they are sometimes referred to as such and classified for gameplay reasons.