In addition to the usual things such as Spells known due to the limited supply of magical knowledge characters will also have a list of "Spells known of" which details the spells you are aware of.
At any time, when you wish to find out if your character knows about a spell, you may make a Knowledge (Arcane castersArcana, Divine Casters (Sans Druid and Ranger)Religion or Druid or RangerNature) check with a DC of 20 + the spells level. Failure requires that you wait until you gain a new spell level to re-attempt the check. You cannot take 10 for this check.
You automatically know of any spell that you can cast.
You can only identify a spell being cast with a spellcraft check if you know of it, however...
You can also add a spell to your list of spells you know of by making such a spellcraft check, even if you failed the knowledge check to know that spell already.
Finally you can add a spell known of by having it explained by somebody who already knows of This means having obtained it one of the above ways. Simply having a villager explain that he swears you can shoot fire from your hands with magic doesn't countsuch a spell, even if you would not be able to actually learn the spell from them.
Scrolls are next to impossible to find in a minimal magic campaign, because you can't buy a scroll and are unlikely to find one lying around.
For this reason, and so that prepared spell casters are not significantly penalised. This game will also include Rituals.
A person with the scribe scroll feat can, in addition to being able to scribe scrolls of their own spells known as normal will be able to enact a ritual to replicate the effect of a "spell known of."
This has a few rules to it:
You cannot enact a ritual of a spell that is not a "spell known of," or does not reside on your class spell list.
If a spell is on your class spell list, and is of a level you are capable of casting then the ritual costs the same time and gp as scribing a scroll of the same spell and caster level. You can reduce the effective caster level the same way you may do so to craft a scroll. Upon completion the spell may be used as if you had used a the scroll.
If you only knew of the spell, but did not know it and you capable of learning spells from a scroll you may instead learn it from this ritual, in this case the spell is not actually cast, but as a scroll it dissipates in the recording of the spell. This process takes the same time as learning the spell from a scroll and still requires the inking materials at the same cost.
If you know of a spell, and it is on your class spell list but it is of a higher level than you can cast, you may still invoke the ritual however the time and money costs of casting this treble for every spell levels difference there is between the spells level, and your own highest spell level. In addition you require additional aid. Each additional participant must use the same knowledge type (arcana, religion or nature) as yourself, each contributes an amount of magical power equal to their highest spell level, and you require a total number of spell levels contributed equal to two to the power of the difference between your own highest spell level and the level of the spell to be cast. A ritual cannot be used to teach yourself a spell of higher level than you have a spell slot for.
A ritual, in any form, may be used to cast a spell for the purposes of creating a magical item. In these cases the ritual absorbs the act of creating or enchanting the item, and takes time equal to the longer of the two processes, plus half the shorter and must be performed as one long process.