Here is the info on our class sets, and where to find them. Good Luck with the hunt.
Dreadmist - Tier 0
Armor: 491
Stamina: 114
Intellect: 118
Spirit: 95
3: +4 Fire and Shadow Resistance
5: Increases damage done to Demons by magical spells and effects by up to 14.
6: Increases damage done by Shadow spells and effects by up to 21.
7: Restores 5 health every 5 sec.
8: Improves your chance to get a critical strike with Shadow spells by 2%.
FelHeart - Tier 1
Armor: 584 (+93)
Stamina: 180 (+66)
Intellect: 126 (+
Spirit: 85 (-10)
Fire: 34 (+34)
Shadow: 24 (+24)
HP Regen: 14 (+14)
3: Health or Mana gained from Drain Life and Drain Mana increased by 15%.
5: Your pet gains 15 stamina and 100 spell resistance against all schools of magic.
8: Mana cost of Shadow spells reduced by 15%.
Nemisis - Tier 2
Armor: 666 (+175, +82)
Stamina: 171 (, +57, -9)
Intellect: 112 (-6, -1
Spirit: 42 (-52, -43)
Fire Resist: 40 (+40, +6)
Nature Resist: 10 (+10, +10)
Frost Resist: 10 (+10, +10)
Shadow Resist: 30 (+30, +6)
Arcane Resist: 10 (+10, +10)
HP Regen: 9 (+9, -5)
3: Increases damage and healing done by magical spells and effects by up to 23.
5: Your pet gains 20 stamina and 130 spell resistance against all schools of magic.
8: Reduces the threat generated by your Destruction spells by 20%.
Where To Find Set Items
Dreadmist
Head: Darkmaster Gandling - Scholomance
Shoulders: Jandice Barov - Scholomance
Chest: General Drakkisath - Blackrock Spire
Waist: Thuzadin Necromancer - Stratholme
Legs: Baron Rivendare - Stratholme
Hands: Lorekeeper Polkelt - Scholomance
Wrists: Blackhand Dreadweaver - Blackrock Spire
Feet: Baroness Anastari - Stratholme
FelHeart
Head: Garr, Golemagg - Molte Core
Shoulders: Baron Geddon, Garr - Molten Core
Chest: Golemagg - Molten Core
Waist: Random Mob - Molten Core
Legs: Magmadar - Molten Core
Hands: Shazzrah, Lucifron - Molten Core
Wrists: Random Mob - Molten Core
Feet: Shazzrah, Gehennas, Sulfuron Harbinger - Molten Core
Nemisis
Head: Onyxia - Onyxia's Lair
Shoulders: Chromaggus - Blackwing Lair
Chest: Nefarian - Blackwing Lair
Waist: Vaelastrasz - Blackwing Lair
Legs: Ragnaros - Molten Core
Hands: Flamegor, Ebonroc, Firemaw - Blackwing Lair
Wrists: Razorgore the Untamed - Blackwing Lair and Golemagg the Incinerator - Molten Core
Feet: Broodlord Lashlayer - Blackwing Lair