The rules for spells and spell casting will vary from genre to genre. Therefore, their rules are listed below by Setting.
Fragments of Karn
Most spells in this game are cast using the Sorcery Skill. Simply put, whenever a character wishes to cast a spell, he/she will make an Event Roll using his/her Sorcery Skill. A NOST of 1 is the minimum requirement with higher NOSTs typically resulting in greater effects of the spell cast.
In order to learn and cast spells, a character must first have learned the appropriate Spell School(s) and Spell School Level(s) for a given spell. When using CP to purchase Spells, the general order to purchase is to 1) find the spell you want your character to know, 2) look at what the Spell School Level requirements are, 3) purchase the required Spell Schools and Spell School Levels, and finally 4) purchase the desired Spell.
Below is a list of the available Spell Schools in Fragments of Karn:
Each spell has an MP cost attached to it. Every time a spell is cast, the caster may roll a Magic Affinity roll. Subtract the number of successes from the Magic Affinity roll from the MP cost of the spell cast. The resulting number is the amount of MP the caster lost from casting the spell.
Example: A spell caster with Magic Affinity of 20 casts a spell that costs 5 MP. The caster rolls the Magic Affinity roll (in this case, 2d12) and gets 2 successes. This means that the spell cost 3 MP to cast (5 – 2 = 3).
It is possible for a spell to be cast that costs no MP at all if the Magic Affinity roll is high enough.