Elves

According to the Dwarves of Polrain, these were once immortal. Since the collapse of the Old World, they have become mortal and extremely risk averse. Mostly they cower in enclaves trying to preserve their, now limited, life.

Magic
Elven magic is of a "fast" nature, like Human magic. Items of their manufacture can still be found.

The King and Prince of Polrain allegedly have a pair of scrolls if elven origin they use to communicate at distance. When something is written in one scroll, it appears on the other.