Tomes of Magic

Tomes of Magic are ancient texts detailing a process in which to cast a high level spell.  A Tome may only be used once per day and has a casting time of one-hour per spell level plus the casting time of the spell itself.  In addition, a character must purchase an advanced feat representing the time required to study the advanced magic within the tome.

In some worlds, tomes are relatively common.  In others they may be exceptionally rare.  In either case they can be hideously expensive.  A Tome in common circulation has a price of 1000gp x Spell Level of the Tome.  It is the GM’s discretion as to which Tome’s exist or are available for purchase.