Hide of the Werewolf is a medium armor set. When you take damage, you generate 5 Ultimate. This effect can occur once every 5 seconds.
Once you get damage and the cooldown is not present, you have a 100% chance to get the 5 Ultimate points. This is a very popular set in PvP, you can front or backbar it and still guarantee procs on cooldown, as long as you swap to the correct bar every 5 seconds. This set is also often used in combination with the Blood Spawn Monster Set, to increase the Ultimate regeneration even further.
Hide of the Werewolf is part of the base game and drops in Glenumbra in the Overland content. Each set item is bound on equip. You can acquire medium armor, jewelry and weapons of this set in the Primal motif style.