Rune

Runes are magical items that can assist the player on the battlefield. There are several types of rune. Runes can be bought or found.

Health Rune
Health runes quickly restore health to injured units within a certain radius of where it was activates. It is the most common type of rune to be found. It is carved with a glowing green heart, that also displays on the battlefield upon use.

Firestorm Rune
Firestorm runes call meteors down from the heavens to strike at the enemy. They can be found, but are easier to buy.

Vision Rune
Vision runes clear the fog of war on one area of the map. They are the second most commonly found rune.

Blizzard Rune
The Blizzard rune summons a blizzard to damage enemy units.

Lightning Rune
The Lightning rune calls down lightning to damage enemy units and buildings. The Stormbringer clan has particular control over this power, later wrested away by Grommel's forces.

Bonesaw Rune
The Bonesaw Rune summons blades.

Slow Rune
The Slow rune slows the run speed and attack of enemy soldiers.

Sheep Rune
The Sheep Rune is uses transmogrifying magic to turn enemies into harmless Sheep.

Shield Rune
The Shield Rune gives all in it's affect radius a brief armor boost.

Rune Shop
Rune shops are buildings that occur on many maps throughout Campaign mode. Like Soul Fountains, they can be captured by standing near them. Once captured, a player can buy up to two runes. Once those are used, more can be bought, until the player runs out of gold.

Trivia

 * Acid Rain doesn't appear to be an available rune, even though it functions like one. It is an ability unique to Syst and the Plaguespitter.