Elemental Rune
An elemental rune is a crafting ingredient mainly used as an intermediate step in crafting element-related items. It is required to craft the infusion table and to duplicate elemental attunement smithing templates. 
Obtaining
Crafting
In Survival mode, elemental runes are obtainable only through crafting.
Usage
The only usage of elemental runes is to craft an infusion table, duplicate elemental attunement smithing templates or be used as a smithing ingredient for elemental attunement.