Levinace

Levinace is a plane of Oblivion where the material that composes Storm Atronachs can be found. By modifying the spell Koron's Peremptory Summons, casters can summon storm Atronachs from this realm in the shapes of many other creatures. The first recorded account of this was when Ysgramor's Clever Man conjured him a Storm Atronach Bear as a mount, though the only confirmed account was when famed Altmer wizard Corvus Direnni summoned a multitude of creatures in Balfiera and Hammerfell.