I recall that it's added damage of elemental type, which is supported here

The Dragon Age Wiki states that multiple of the same type also stack

  According to this thread, even same typed stack such as Frost Weapons spell and frost runes

So you could do two +2 frost, and frost weapon spell, and they would all add up on top of your normal weapon damage.

I recall that it's added damage of elemental type, which is supported here.

The Dragon Age Wiki states that multiple of the same type also stack. According to this thread, this applies even to damage of the same type, such as the Frost Weapons spell with frost runes.

So, for example, you could do two +2 frost, and frost weapon spell, and they would all add up on top of your normal weapon damage.

I recall that it's added damage of elemental type, and this supports it: http://dragon-age.alteredgamer.com/dragon-age-origins/58594-doa-tactics-runes-and-enchantment-guide/

The Dragon Age Wiki states that multiple of the same type also stack: hxxp://dragonage.wikia.com/wiki/Weapon_runes_(Origins)

According to this thread, even same typed stack such as Frost Weapons spell and frost runes: http://www.gamespot.com/dragon-age-origins/forum/morrigans-frost-weapon-buff-stackable-with-runes-52156763/

So you could do two +2 frost, and frost weapon spell, and they would all add up on top of your normal weapon damage.

I recall that it's added damage of elemental type, which is supported here

The Dragon Age Wiki states that multiple of the same type also stack

According to this thread, even same typed stack such as Frost Weapons spell and frost runes

So you could do two +2 frost, and frost weapon spell, and they would all add up on top of your normal weapon damage.