The spell summons illusonary Terrors. What type of Terrors are summoned is random, but it is possible for Revenants, Bonewalkers, Gargoyles, Necrodragons, Witches, and more to appear. Like all summoning spells, the summoned units will vanish if the caster dies. It is similar to Invoke, and could be considered a player-usable version of Conjure.
The Lesser Key of Solomon, also known as Lemegeton, is a 17th-century grimoire of demonology.