2 items: Adds 657 Critical Chance
3 items: Adds 129 Damage
4 items: Adds 1487 Penetration
5 items: Enemies affected by your alchemic poisons take 285 Disease Damage every 1 second. This effect scales off the higher of your Weapon or Spell Damage.

Type: Craftable
Location: The Reach
Traits needed to craft: 6
Requires DLC: Markarth

Obtainable items:
Jewels
Weapons
Light Armor
Medium Armor
Heavy Armor