The Iyanden are a Craftworld of the Eldar in Eternal Crusade.
The Iyanden Craftworld was once one of the largest and most prosperous of all the remaining Eldar Craftworlds. They barely survived an attack by the Tyranid Hive Fleet Kraken, which nearly destroyed the Craftworld and killed four-fifths of its population.
The Eldar of Iyanden rely much more heavily upon the spirits of the dead to defend them because of their low numbers. Iyanden makes heavy use of the Wraithguard and Wraithlords, cybernetic warriors animated by the souls of their fallen kin.