Kalthar Wolf-Brother – EP Templar - 50 Maeli Valen - EP NB - 50Naps-During-Trials – EP Templar - 50Rulnakh - EP Sorc - 50Azrael Krieg - EP NB – 50Uvithasa Telvanni – EP DK – 50More-Tail - EP Warden - 50Narile Galen - EP Sorc - 50Bone Soldier - EP Necro - 50Naps-During-Trails - EP Necro - 50
The Ebony perk comes from the Ebon Armory set. It gives you a 1k health bonus as long as you are in range of the person in your group who is wearing it.
There are several sets that give group of up to 12 players bonuses like Sanctuary, Ebon Armory, Worm's Raiment and Hircine's Veneer. A good way to tell if someone in your group is wearing them is to look if they have colorful balls of light floating in the air around them. Red light balls mean Ebon Armory, and that's a good sign on a tank because your group will be getting a small health buff. Blue light balls mean Worm's Raiment and that reduces magicka costs. Often, one healer in a trial will wear Worm's Raiment. Hircine's Veneer and Sanctuary are both green and increase stam regen and healing respectively. Those sets are acquired by running certain dungeons and generally mean that player does a lot of group content.
Thank you @VaranisArano , I passively seen some of those sets but never really paid attention to that 5th perk. You laid out a good description of them and what they do. I guess I found it odd getting a perk to which had no description in my character window made me question if it's something I did, a glitch or cheat. Hahaha 8D , thanks.