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→Rune Functions
[[File:Runes5.jpg|left|thumb|115px|The five Runes.]]
Runes have no function on their own, other than beautifying your inventory. They are only useful once they're [[socket]]ed in into a skill, where they modify alter the skill's function, always in and often improve it. However runic alterations may make a skill less suitable to a beneficial wayparticular use. Any rune in a The Wizard's skill is an improvement over the base function 'Ray of the skillFrost,' for instance, produces a straight beam that deals damage and since runes are easy to swap slows enemies instantly at any range when un-runed, but produces a swirling, 360-degree field of sleet in and out of skills, itthe Wizard's always in your best interest to stick a immediate vicinity when under the effect of an Indigo rune into , or deals less damage but has a skill at greater slowing effect when under the first opportunityeffect of an Obsidian rune.
The functions of the runes are not entirely predictable in a given skill. Their bonuses vary widely and wildly, and all rune functions are custom assigned by the devs; none of them are simply +x damage, or +X casting speed. ([[Gems]] provide those sorts of predictable bonuses when socketed into items.) Creating and implementing the rune effects was a tremendous amount of work for the developers and artists; there are nearly 120 skills x 5 runes in each.
