Atronach Altar

The Atronach Altar is located in Frostcrag spire's main level.

You have to purchase the wizard's tower DLC in order to use it.

You can offer 3 kinds of salts here to summon a permanent atronach familiar;

3 Void Salts for a Storm Atronach

3 Fire Salts for a Flame Atronach

3 Ice Salts for a Ice Atronach

You can also summon another creature in addition to the atronach, using regular Conjuration, thus it is possible to get more then 1 familiar at one time.

The Atronach can be dismissed whenever you choose so by talking to it.

There are reports of a particular glitch/bug, that makes you atronach's body freeze on spot after it's death.

This cannot be fixed, but means no harm; you can still summon another one.

Only one atronach may be summoned from the altar at one time.