The spell is of the Mysticism school.
The atronach is a permanent creation; a spell component/ingredient is required to complete the creation.
There are four different atronachs corresponding to elements that can be created:
- Fire/fire : requires Sulphur ingredient
- Ice/frost : requires Turquoise ingredient
- Flesh/poison : requires Elixir Vitae ingredient
- Iron/shock : requires Lodestone ingredient
The component is consumed by the spell.
Note that attempting to create an atronach for the Magic element type will just result in wasted magicka.
Anyone moderately skilled with Mysticism can create an atronach; controlling it is another matter.
The Chance value specified in the SpellMaker determines the probability that the atronach will be allied with the spell caster.