Kroat Abyss was named after one of the first Straken Lords.
Used to store elf magic, talismans and sorceries used against the Jarka Ruus in ancient wars. They were locked away when the Demons were trapped in the Forbidding. No one knew their powers or how to use them.
When Tesla Dart was explaining what the valley was used for, Redden Ohmsford realised that the missing Elfstones could be amongst the items stored there.