2 items: Adds 34-2975 Spell Resistance
3 items: Adds 14-1206 Maximum Health
4 items: Adds 12-1096 Maximum Magicka
5 items: When you take damage, you have a 15% chance to restore 28-2408 Magicka. This effect can occur once every 4 seconds.
The set consists of light armor and jewelry in all slots, as well as weapons and shields of all types.