Nightmare

Story
A phantom given shape by Catboy/Catgirl's nightmares. There's really not much else to know about it; something that dreamt itself up is too simple to have a particularly complicated nightmare, however its creator seems to have no control over it, unlike other phantoms its creator created.

Abilities
The nightmarish phantom has abilities similar to its creator, though more dangerous in every way. Its charms are much more forceful, and require a higher grade of magic resistance to stop. However, its dream manipulation and phantom summoning abilities, though stronger and harder to resist, are also more limited; the nightmare is only able to inflict or summon other nightmares.

Rather than having a vague and fairly weak life draining process, the nightmare is also much more forceful with this, stealing the life force of others through a phantom weapon. The exact shape or physical function of this weapon can vary, but they all have the basic properties of being phantasmal in nature, and absorbing the life force of its victims.

As its use of weapons might suggest, the nightmare is also a much more dangerous combatant than its creator. Against enemies with an iron will and no particular fears, it's still particularly dangerous (7), but against those with any sort of doubts or worries, or against those who lack the ability to resist its dark charms, it can become extremely dangerous (up to 10).

Being a phantom itself much like its creator, it also isn't hard for the nightmare to change its shape, but it has the same nightmare-themed limitation that its creator does. Since its inherently its creator's nightmare, it always at least has access to its nightmares as far as phantom summoning is concerned, and may always take any form that lurks within its creator's nightmares.

Probably the most dangerous part about the nightmare, though, is that it will continue to exist so long as its creator does and is capable of having nightmares. Destroying its form cannot permanently destroy its essence, as it will simply regenerate over time. However, make no confusion - simply killing its creator is not enough to destroy it as well; its own body would have to be destroyed too.