Rune

A Rune is a special kind of upgrade item that is applied to a character's armor. Runes are most often obtained by using an Expert Salvage Kit on Salvage Items and Weapons dropped by foes, such as Ettin's Pauldron or Seeker's Armor. Only a certain level of item rarity can have a rune. To view the runes your class can use, see out Rune Listing page.

Types of Runes
Runes come in 3 types:

Minor Runes provide minor bonus to the named statistic.

Major Runes provide a larger bonus to the named statistic.

Superior Runes provide an even larger bonus to the named statistic.

Use
To use a rune, double-click it and then click on the piece of armor you want to apply it to. Only one rune can be placed on any armor at a time. Runes can only be used on attributes of your primary profession.

Stacking
Runes affecting the same stat do not stack. Ergo, you can only receive one benefit from any particular line of runes. Example:

A Minor Rune of Vigor adds +20 Health. If you attach this to your chest armor, and a second Minor Rune of Vigor to your head armor, you will still only have +20 health. If you attach a Major Rune of Vigor to your hand armor, you'll gain a total of +30 health; the two minor runes will effectively be overwritten by the higher-quality rune.

Recovery
You can use an Expert Salvage Kit on armor that you've placed a rune on to (probably) recover the rune.