ArmorSet bonus
(2 items) Adds 1096 Maximum Magicka
(3 items) Adds 657 Critical Chance
(4 items) Adds 1096 Maximum Magicka
(5 items) Whenever you deal Flame, Shock, or Frost Damage, you apply a stack of Flame, Shock, or Frost Weakness to the enemy for 3 seconds. Each stack of an Elemental Weakness increases their Critical Damage taken by 5%. An enemy can only have one stack of each Elemental Weakness at a time.
ArmorSet bonus
(2 items) Adds 657 Critical Chance
(3 items) Adds 129 Magicka Recovery
(4 items) Adds 129 Weapon and Spell Damage
(5 items) When you deal damage with a Light or Heavy Attack, you put a Mark of Revenge on the enemy for 15 seconds. After stacking 5 Marks of Revenge on an enemy they detonate for 1462 Magic Damage.
You can only apply a stack once every half second and the damage scales off the higher of your Weapon or Spell Damage.
Black Gem Monstrosity LEVEL 50 - CP 160
ESO-Hub.com
TypeMonster Set
ArmorSet bonus
(1 item) Adds 1487 Offensive Penetration
(2 items) While in combat, casting a Soul Magic ability consumes a Soul Gem and gives you a Black Gemsplitter for 10 seconds. This effect can occur once every 6 seconds. Dealing Light or Heavy Attack damage fires the Black Gemsplitter at your target, dealing 17.1% of your target's Max Health as Magic Damage, up to 17100 Magic Damage.
ArmorSet bonus
(2 items) When your Regeneration critically strikes, you restore 558 Magicka. This effect cannot occur from simultaneous critical strikes.