A mage who is hired to work in a player character's dwelling may
know special spells that can be cast on their employer. The more
spells they have the more they will cost to contract in the first place.
Each spell then has a cost to actually cast each time.
The following is a list of spells are currently available on mage guards
and their APPROXIMATE cost per casting:
* Teleport to a single limited location - 2000 gold per spell.
* Comprehend languages - 50 gold per spell
* Armor - 50 gold per spell
* Shield - 50 gold per spell
* Fly - 100 gold per spell
* Invis - 200 gold per spell
* Darkvision - 50 gold per spell
* Levitate - 100 gold per spell
* Water breathing - 150 gold per spell
Note that not all mage guards will be able to cast these spells.
On hiring a mage guard will tell you what spells he/she is able to cast
and their charge. Saying spells, will have the mage guard telling you
what they cast and the cost if you are their master.