The rules presented here are incomplete. This is partially because I'm not done with adapting the Talislanta rules. It is also to avoid republishing Talislanta setting information (i.e. plaigarism).
More here later.
Spellcasting ability is represented by Orders (aspects) and Modes (skills). An Order is a magical tradition. It governs the style of your magic use, as well as what sort of effects you can generate. Decriptions of the most well-known orders in Talislanta start on page 44 in the main book (4th edition).
Modes govern what sort of effects you can generate, and with what level of skill. Each mode is an abstract representation of a large number of related spells. You may create a spell as your character (who is assumed to have known it all along) casts it, but it can spice things up to come up with descriptions of spells your character knows ahead of time.
Note that modern Talislantan magic cannot:
See the Talislanta book for descriptions of the 12 Modes. Example spells are described with each Order in the main book.
Margin of Success
If you are using a favored Mode/Order combination, the Order may be activated to improve the spell roll. This can often improve the MoS to a level that no spell penalty is acquired, making it a better option than activating the Order to ignore the spell penalty.
(tentative and incomplete)
Cartomancy
Favored: (Alter and Influence)? Restricted: Transform and Summon.
Cryptomancy
Favored: Ward and Reveal. Restricted: Transform.
Crystalomancy
Favored: Defend and Heal. Restricted:
Elemental Magic
Favored: Conjure, and one additional mode by element:
Pyromancy: Fire
Aeromancy: Move
Geomancy: Defend
Aquamancy: Transform
Restricted:
Invocation
varies heavily by religion.
Mysticism
Favored: Influence and Reveal. Restricted:
Natural Magic
Favored: Reveal and Heal. Restricted:
Necromancy
Favored: Summon and Heal. Restricted:
Shamanism
Favored: Reveal and Heal. Restricted:
Witchcraft
Favored: Ward and Reveal (and Heal?). Restricted:
Wizardry
Favored: Any one mode of your choice. Restricted:
More here later.
More here later.