Centuries ago, a tribe of elves and their merfolk allies were transported to Rath along with a sizable body of water. Over time, the elves and merfolk began fighting over dwindling food. Realizing they were at a disadvantage, the elves decided to build a new home via magical means. In a matter of months a new forest had grown; at its base, the roots of the trees tangled into an almost-solid floor of plant life, and this strange edifice floated upon the water, which became known as Rootwater.
The forest canopy thickened so that barely any light reaches the depths of the forest. This suits the elves, who do not want to be reminded of the horrors of this world, and they have named their new home Skyshroud Forest.