Yornar's Trail Companion

Yornar's Trail Companion, or simply the Companion, was a holy spellbook of the Church of Mielikki that had been granted to the legendary ranger Yornar by the Lady of the Forest herself, then passed from ranger to priest and priest to ranger down through the centuries.

Description
The book had an unusual crescent shape, resembling the lunar phase. For a spine, it had a single, sturdy scrollwork hinge that curved along the middle part of the crescent's outer curve. It had ironwood covers bound in leather and the crescent's horns were sometimes seen with protective metal caps. The whole book appeared well-used and worn by time and the elements. It was roughly tall, as measured straight from horn to horn.

Within the covers, the book had many pages apparently made from the mineral mica. These sheets were cut to the thickness of a hair and polished smooth.

Contents
Each page of Yornar's Trail Companion displayed a single divine spell. As documented by Rhighaermon O'Antlers, these spells were known to be:
 * accelerate healing • age creature • age plant • animal friendship • animal growth • animate rock • anti-vermin barrier • anti-animal shell • anti-plant shell • banish blight • barkskin • breath of life • call woodland beings • circle of privacy • clear path • conjure animals • control temperature, 10' radius • control winds • create campsite • create food & water • create treant • create water • cure blindness or deafness • cure disease • detect snares and pits • dispel magic • efficacious monster ward • endure heat/endure cold • entangle • faerie fire • find drinkable water • find the path • fire purge • free action • giant insect • ground trace • hallucinatory forest • heroes' feast • hold animal • hold plant • invisibility purge • invisibility to animals • invisibility to undead • know age • know alignment • know direction • know time • land of stability • liveoak • locate animals or plants • locate object • log of everburning • lower water • monster mount • nap • neutralize poison • part water • pass plant • pass without trace • plant door • plant growth • protection from fire • purify food & drink • reflecting pool • reincarnate • repel insects • resist fire/resist cold • slow poison • snake charm • snare • speak with monsters • speak with plants • spike growth • stalk • tongues • transmute rock to mud • transport via plants • tree healing • tree steed • tree • turn wood • unceasing vigilance of the holy sentinel • undead ward • unicorn steed • wall of thorns • warp wood • water breathing • water walk • weather stasis • weather summoning • wolf spirits • wood sword • zone of sweet air

Powers
In addition, the book itself possessed a number of magical powers and properties. The mica pages were utterly unbreakable, apparently due to a magical treatment. Moreover, the covers bore numerous item enchantments, rendering them invulnerable to fire, physical damage, and all known spells, even dispel magic and disintegrate.

The Companion could also glow faintly, similar to a faerie fire spell, when touched and willed to do so. Its light could be quietly dimmed in the same way. Thus, the book could be used as a handy source of light, and was frequently used in just this way by the countless rangers who carried it through the woodlands at night.

In addition, it had the odd property that, when the book contacted any substance that was poisonous or corrosive to humans, elves, and half-elves, it became oddly prickly to the touch of bare skin. This had the practical benefit of allowing the bearer to detect poisons by dipping the book in a liquid or touching it to food, or waving it through the air when toxic gases were feared.