Law of Julianos is a crafted set and is available in all armor types. The 5-piece set bonus adds 299 Spell Damage.
The set is very popular among magicka damage dealers, because the extra 299 spell damage increases the damage of all attacks and heals tremendously.
The Law of Julianos set is part of the Orsinium DLC. The crafting station is located in Wrothgar (Boreal Forge). You can craft any armor, weapon or jewelry of this set in any motif style you know, as long as you have 6 traits researched (per item). You can trade crafted pieces to other players. Each set item becomes bound on equip.
ESO
Sets