Draugr's Rest is a light armor set. When you deal damage with a fully-charged Heavy Attack, you create a circle of consecrated ground that heals you and your allies within 5 meters for 11,000 health over 10 seconds. This effect can occur once every 10 seconds.
The Draugr's Rest set is part of the Horns of the Reach DLC. It drops in Falkreath Hold in Craglorn. Each set item is bound on pickup. You can acquire light armor, weapons and jewelry of this set in the Dreadhorn motif style.