Tome of Dripping Shadows
This book constantly drips evanescent tendrils of shadow that seethe and writhe. The tendrils have a will of their own, retreating from light sources and curling toward darkness. While you hold the tome, you gain darkvision; if you already have darkvision, you gain greater darkvision instead. Preparing spells from this tome strengthens your shadow magic and gives you a greater understanding of shadow spells you add to this tome. Any shadow spells you prepare from this tome that are at least 2 levels lower than the highest-rank spell you can cast are treated as 1 level higher for the purposes of counteracting them. When you add a shadow spell to this tome, you can prepare heightened versions of that spell up to the highest level of that spell that you are able to cast.
Activate ↺ envision
Frequency once per day
Trigger A target of a shadow spell you prepared from the grimoire critically fails a saving throw against the spell
Effect You recall a fragment of the shadow magic that suffuses your target and wrap it around yourself like a caul. The triggering creature's saving throw result is a failure, not a critical failure. For the next minute, you become Concealed to all creatures and you are Hidden from the triggering creature, regardless of what precise sense it has. If you use a hostile action against the triggering creature, you become only concealed to it (rather than hidden) at the end of the hostile action.
Traits
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.
Effects and magic items with this trait involve false sensory stimuli.
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.
This magic involves shadows or the energy of the Netherworld.