The Morghast Archai / Harbingers are a recent release for Warhammer: End Times!
This multi-part plastic kit allows you to make either 2 Morghast Archai or 2 Harbingers. The full rules for using these miniatures in games of Warhammer are included in Warhammer: Nagash. They can also be found in the construction booklet that accompanies the miniatures.
This kit comes supplied unpainted and requires assembly.