Here are more spells that suit a Magus specializing in frigid climates, many of the other CrAq & PeIg spells were inspired by Frozen across the blog posts last year, where these are instead effects that would be needed for life in the region.
Ward Against Winter’s Cold
Rego Ignem 15, R: Touch, D: Sun, T: Individual
Target is protected against all normal cold and supernatural effects inflicting +5 damage.
(Base 4, +1 Touch, +2 Sun)
This ward protects in the same manner as the Ward Against Heat and Flame (Ars p.143).
Then moving on to a more mythic spell which surround the caster in toughened armour of ice. I like the idea that a specialist will find benefits and alternatives which suit their magic rather than mundane or obvious means.
Armour of Unbreakable Ice
Creo Aquam / Muto Terram 15, R: Personal, D: Sun, T: Individual
The caster is encased in a thick armour of unnaturally resilient ice, which offers protection akin to skin of metal armour. The ice moves with the caster, adjusting to their movements which provides an additional 6 Protection and 3 Load.
Without some extra tolerance to cold conditions the caster will find themselves uncomfortably chilled, loosing a Fatigue level per diameter of exposure.
(Base 4 for highly unnatural substance with Muto requisite, +2 Sun, +1 very strong with Terram requisite)
Aside – I’m not sure what the correct adjustment for Protection and Load should be. Ice itself wouldn’t provide much additional Protection from damage (base 3), but when the ice is further made highly unnatural (base 4 with Muto to have flexibility and become like armour), and then has additional mag for toughness with a Terram requisite it feels right to me that the strength of metal and the unnatural attributes would provide a benefit better than normal armour can offer.
There is also no steel full armour akin to a contiguous skin-suit, as even full plate has links, gaps, and problems of being a set of interconnected parts. This magical ice armour does not have these limitations. I also considered a Rego requisite to have the armour move with the wearer but am not convinced that it is needed.
Rather than special glasses this spell allows the caster to see in the worst snow storms and tough conditions.
Clear Sight of the Arctic Fox
Intellego Aquam 15, R: Personal, D: Sun, T: Vision
The caster can see through snow and ice, which appear as highly translucent shadows of their previous images. This allows the caster to see through barriers and obstructions, and clearly in snowstorms.
(Base 1, +2 Sun, +4 Vision)
Lastly a never melting ice block might be handy outside the region to provide an instant cold room in warmer lands. It’s a very simple and low level effect.
Persistent Circle of Ice
Creo Aquam 10, R: Touch, D: Circle, T: Individual
Conjures a block of ice within the drawn circle, shaped to the size of the circle. The ice will persist until the circle is broken. Anything else within the circle will be encapsulated.
(Base 3, +1 Touch, +2 Circle)
Find hundreds more new spells for Ars Magica in the Grimoire.