Half of each class's Support Spells are Passive Spells, and the rest are active. These spells start at level 0, and can be upgraded to level 9 (active spells) or 20 (passive spells).
Support Spells are unlocked with your overall character level. You gain 2 with a new character, then gain an additional 2 per level. So by level 6 of your class, you will have unlocked all ten.
All characters gain 5 Skill points per class level for the purpose of spending on Support Spells.
All Passive Support Spells cost a fixed 5 Skill points per level, costing 100 points in total for the full 20 levels.
For the active spells, the cost of each spell level increases gradually, and each spell's costs is calculated separately (levelling one spell will not increase the cost of the others).
- Support Spells are often known as "Class Special Abilities" or Class Specialities.