Reworking the spell The Incantation of Lightning to show how savage a damage of time (DoT) effect can be in Ars Magica. The Incantation of Lightning (IoL – Ars p.126) is already a dangerous spell for targets without magical resistance, and applying the same effect round after round is wonderfully effective.
The Incantation of Enveloping Lightning
Creo Auram 40, R: Voice, D: Diameter, T: Individual
This spell envelops the target in a prolonged field of lightning, which inflicts +30 damage per round for the duration, and applies a knockdown effect (as per the Incantation of Lightning spell).
(Base 5, +2 Voice, +4 unnatural, +1 Diameter)
As the lightning effects start from base 5 but also have a +4 magnitude increase for complexity to unnaturally control there is very little scope to use lower powered bolts. This really means that lightning manipulation for combative purposes is level 25, which is a very high baseline.
For the Auram magus who must destroy the maximum number of mundane targets at once; a group version of IoL and a group version which also uses the damage over time duration.
The Incantation of Chained Lightning
Creo Auram 45, R: Voice, D: Momentary, T: Group
This spell strikes the targeted group with a blast of lightning which appears to arc between group members. This inflicts +30 damage to each group member and applies a knockdown effect (as per the Incantation of Lightning spell).
(Base 5, +2 Voice, +4 unnatural, +2 Group)
The Incantation of Voluminous Lightning
Creo Auram 50, R: Voice, D: Diameter, T: Group
This spell strikes the targeted group with a blast of lightning which appears to arc between group members. This inflicts +30 damage for two minutes to each group member and applies a knockdown effect (as per the Incantation of Lightning spell) when the spell strikes.
(Base 5, +2 Voice, +4 unnatural, +1 Diameter, +2 Group)
While there is no subtle way to use a lightning bolt, perhaps it can be made less overt, but firstly summoning a powerful storm which includes lightning effects; and then having a bolt strike the desired target.
The Incantation of Heaven’s Lightning
Creo Auram 40, R: Sight, D: Momentary, T: Individual
This spell can strike any target the caster can see with a blast of lightning which appears to come from the sky above. This inflicts +30 damage and applies a knockdown effect (as per the Incantation of Lightning spell). This spell will appear totally unnatural unless a lightning storm is currently underway.
(Base 5, +3 Sight, +4 unnatural)
Summon the Storm of the Heavens
Creo Auram 35, R: Sight, D: Sun, T: Group
Creates a thunderstorm which covers a ten mile wide area with rain, winds, and lightning. The storm gathers and dissipates very slowly over 30 to 60 minutes, and if the spell is cast too close to the expiry the storm may not actually form properly.
The intent of the spell is to conjure a powerful storm which is also natural looking, although a storm which lasts all day will also be noted as unusual.
(Base 2, +3 Sight, +2 Sun, +2 Group, +2 size)
This is a more natural looking version of Clouds of Rain and Thunder, from Ars Magica page 126, which creates a very small thunderstorm.
For these and over 200 other new Ars Magics spells see the list of spells.