This is a magical book. On facing pages are paintings of monsters and a spell written in invisible ink, which can be revealed only by applying some blood, squeezed from the heart of the creature illustrated.
- Goblin
- Chimera
- Red Dragon
- Gorgon
- Troll
- Salamander
- Pegasus
- Roper
- Cyclops
- Manticore
- Minotaur
you could choose spells related to the monster (Polymorph other Chimera, for Fly for Pegasus, Stone to Flesh for the Gorgon, etc.) but you can substitute any spell, with a level no more than 1/2 the monster’s HD. These spells should not be otherwise available.
Alternately, the book sits at the entrance of a dungeon. Soaking the image with the right type of blood will open the portal to a deeper level, or open areas of levels already revealed.
I approve of this item.
[...] book set on a podium in the building’s foyer was not a visitor’s register but in fact a Bestiary of Blood, completion of which would open the magically locked bank [...]