* Reincarnation Spell *
You can get it from the cupboard in Den's appartment or the temple in Anekbah (Use food for koopies in Kyle's appartment to get the key. Use it in your office in Security HQ, to get the instructions).
It's the base spell which you need to complete the game. It will never vanish, but it requires mana instead - you can replenish it by using mana potions (usually found by killing demons) or regeneration potions.

* Truth Spell*
Like most other spells, single use only. It is a completely optional spell that you can use to get the needed information from the gunshop owner at one point in the game. Using it (and not reincarnation) nets you a free megazooka.
Mix dead man's tongue in a beshem (you find both in Xandar's temple at the Awakened HQ) with a wiki (you can buy it in a sorcery shop in Anekbah or just find at wiki garden near the temple in Janpur).

* Unmask a demon spell *
This spell is mandatory in order to progress with the game. Therefore, it should not be difficult.
Mix ampher dew (locked chest in library) in a beshem with a sham horn (Namtar's room).

* Resurrection Spell *
Mix a jinpan feather (found it Jahangir park) in a beshem with a drop of shadows (buy it).
Used to resurrect Kiwan in the game.

* Invulnerability spell *
The books says:
For temporary invulnerability against those who wish your ruin,
mix a virgins blood with a tear of ether in a beshe´m.
You can actually find a made spell that you can use (one time) and it increases basically all of your stats a lot. Permamently, but only for the currently used body.
See the secret at wiki garden to check how to obtain it.

* Love spell * <flavour text only>
The book say:
To make a woman fall in love with you,mix two sham testicles
and nine mouse teeth in a beshe´m.Cast the spell on the
woman you wish to seduce and she shall be yours forever.
As far as I know, you can't make this spell (added for flavour most likely)

* Transformation into Gold * <flavour text only>
To transform any object into gold, mix a Dalyop leaf picked at the Olaz equinox and three ounces of dew mixed with a drop of virgin's blood.
Pound all these with a leaden mace then place on strong heat for three cycles.
Dip a finger into the boiling solution.
All objects touched by this finger shall instantly be transformed into pure gold.
Be careful, for this charm also works with living beings.
It is also a flavour text, obvious King Midas reference :)

* Transformation into a Sham * <flavour text only>
To transform a human into a sham, mix two Kashimis seeds, 1 drop of sham milk and nine hairs of Devil's Dog in a Beshe'm. Have the person drink the potion. Metamorphosis into a sham begins immediately and can last up to one week.

* Potion for Predicting the Future * <flavour text only>
Potion for Predicting the Future
To see the future, mix rat's urine and bile from a killer spider in a Beshe'm.
Drink in one gulp under a full moon.
The future will hold no more secrets for you.

To access a secret location in the Wiki Garden located at Janpur (see the video) you have to do the following:

In Anekbah, there is a beggar sitting behind a corner of a Supermarket. Give him few seteks.
He will ask you for a life potion. Continue to play the game until you stumble upon one (you should!) - or if you already used one - buy another one from the sorcery shop not far away (you unlock it by following the story). The beggar will give you his key.
The moment you are allowed to go to the Janpur districk, call a slider to the Temple.
You should see a little bit of green tree when you exit the slider. Go there - it's the Wiki Garden. Pick up the wikis and go into the left corner, you can find a closed door there. Use the key and enjoy. Few potions, magic books and a powerfull spell that will increase all of the stats of your current body permemently.