You don't know if the thief would go as far to kill you or not, but you were scared, and desperate. That may be what lead you to cast the next spell.
"Decay!" You shout in the language of ferrets.
The thief raises his hand to cast a spell of his own, then freezes. Before your very eyes he begins to age. One second he appears to be in his forties, the next in his sixties, then his nineties, then he appears to be quite dead and still ageing.
The effects of the spell you released are to horrible to watch, and you shut your eyes. In a few moments, you open them, to see a skeleton on the floor decay into dust. The dust is soon blown away into the wind, leaving the Book of Beast on the floor by itself.
You've won.
You quickly run over to the book, and look down at the book for a spell to reverse the spell cast on you.
"Shape!" You shout in the language of ferrets while thinking of a human.
There is a puff of smoke, and you look down at yourself, happy to see yourself as a normal human...... Though, naked. You quickly run over to your clothes and get dressed, then retrieve both the Book of Time and the Book of Beast. You now have two of the tomes. Curious, you examine the Book of Beast to see what spells are in it.
I. Summon Animal
To summon an animal and take control of it is quite simple. Just speak the command word "companion" and concentrate on the animal you wish to summon. The closest animal fo that species will be transported to you. It normally consumes very little energy to summon an animal, and you can spend a little more to summon a specific animal, for example your pet. A summoned animal is normally easy to control, as most normal animals have a weak willpower.
II. Familiar
This spell allows you to form a permeneant bond with an animal of your choice. The spell puts some of your power into the animal, and even allows you to grant the animal the ability to cast some of your spells. The command word is 'Familiar'. It consumes a large amount of energy to initially cast the spell, however requires no energy to maintain it, and the familiar is often able to supply you with extra energy. A last note, you can communicate telepathically with your familiar.
III. Beast Shape
This spell allows you to transform yourself or another target into an animal of your choice. You must speak the command word 'shape' and focus on the animal you want. To designate a target, point at what you what to transform. If you do not point at a target, you will transform yourself. This spell requires very little energy.
IV. Half Shape
This spell allows you to transform yourself or another partially into an animal. Point at a target to designate it, or if you don't point at a target you will transform yourself. The command word to inintiate the spell is 'Half'. This spell can be used to make the target any part animal and part human. You can do something qutie simple as just a tail, make one 50% each, or even just have them only retain their abilities to speak in the human tongue. This spell requires a mild amount of energy.
V. Control Animal
This spell is similar to summon animal, but was made to be used on hostile animals. It allows you to completely take control of that animal and order them to do your own bidding. It requires only a mild amount of energy to use, and the command word is 'control'.
VI. Borrow
This spell does not control or manipulate an animal in any way. Instead, it just allows you to temporarily borrow the animal's senses. Basically, if you use this spell on a bird flying in the sky, you'll be able to see everything the bird sees, and could use that to get a general idea of the area or who else is in the area. It requires only a mild amount of energy. The command word is 'borrow' and you must focus on the animal you wish to see through.
VII. Control
This spell is a stronger version of borrow. While borrow only allows you to borrow the senses of an animal, control allows you to transplant your soul in an animals body in order to have full control of the animal. It can be used to scout, or. In the event the caster is near death, this spell has sometimes been used to transfer their soul so they could live on as an animal. It will not effect humans though. The command word is 'transfer' and you must concentrate on the animal you wish to control.
VIII. Mass Summon
This spell allows you to summon either one of two groups of animals. You can either summon all animals in a given area, or a large amount of one paticular type of animal. The spell's command word is 'mass summon' and requires about twice as much energy as a normal summon animal spell.
IX. Mass Transform
This spell works like the beast shape spell, but effects a large area. The caster can pick a type of animal such as felines, or a paticular animal such as wolf, but can not select the spell to turn everyone in the area into a different type of animal. The spell's command words are 'mass transform' and the caster must focus on the area and the animal or animal type. If the caster is in the area he will be effected. The spell consumes a large amount of energy.
X. Mass Half Shape
This spell works like Half Shape, but allows the caster to effect a general area. The same rules apply of animal and animal type as in mass transform, and requires a large amount of energy as well. The command words are 'Mass Half'. If the caster is in the area he will be effected by the spell as well.
"Alright then.... But what to do now....."