This spell is a part of the Mourning Bell spell chain and is found in the Mourning Bell rune stone.
The rest of the dying is hardly, if ever, peaceful. The closer to their appointed time they come, the more their own mind fights to hang on. Trying to make sense of what is coming, trying to sort out the anxiety and fears growing with, these activities often give rise to nightmares when the dying sleeps. It is the unfortunate reality that the necromancer has witnessed time and time again. It comes as no surprise to the necromancer that, calling upon the gentle, welcoming power of Serenity that they too can cause the nightmares of the dying.
When the necromancer casts Nightmare, that is their aim. They seek to bring to their enemies a taste of what awaits them in their final days. Reaching within their runic soul, the necromancer finds Serenity and lets it loose. Serenity floats gently into the minds of all that are hostile to the necromancer, coaxing them and bringing to their mind a state of wakeful slumber. For but an instant every enemy is unable to move as a terrifying creature seems to appear before them. What each see's is personal and unique to that person. It could be a recreation of a terrible memory. It could be the image of a demon. It doesn't matter. What matters here is that the enemy fears it and believes for that moment for it to be real. The creature strikes, each striking their target. The damage that each receives, 3d8 magical damage, isn't caused by something real. It is caused by the power of Serenity and the nightmare that they see. The damage itself is real however, as is the loss of life they felt. Serenity then leaves them, returning to slumber back within the necromancer's runic soul. Each enemy is released, recovering from the horror that they saw, finding to their terror that the damage they felt was very much real.
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