Festrem Mortu
The book's cover is a patchwork of tanned humanoid skin that reeks of rotting meat. The longer a living creature studies this book, the more the scent of decay appeals to them.
Activate ↺ (concentrate, necromancy)
Frequency once per day
Trigger Your last action was to cast a necromancy spell prepared from this grimoire
Effect You draw void energy from the triggering spell. You gain 10 temporary hit points that last for 1 hour.
Special If this grimoire is used to prepare spells five days in succession by the same caster, that caster is subjected to the curse of the ravenous.
Curse of the Ravenous
This hideous curse kills through constant hunger. You become gaunt and repeatedly gnash your teeth.
Saving Throw DC 20 fortitude
Effect No matter how much you eat, you aren't satiated. After 1 day, you begin starving. Each week, you receive a new saving throw against the curse.
Traits
An item with this trait is cursed to cause trouble for its owner. A curse isn't detected when the item is identified, though a critical success reveals both the presence and exact nature of the curse. Cursed items can't be discarded once they've been triggered or invested the first time. The item can be removed only if the curse is removed.
Spellbooks are useful tools for any magic user to write down incantations and runes of power, but where most spellbooks are nothing more than ink on parchment, grimoires have absorbed the magic of the spells within—magic that knowledgeable spellcasters can use to augment their spells.
Something with the magical trait is imbued with magical energies not tied to a specific tradition of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.