Here are the datamined Tier Set changes for today's 10.1 PTR build!
Howling Blast damage increased by 10%20%. Consuming Rime increases the damage of your next Frostwyrm's Fury by 5%, stacking 10 times. Pillar of Frost calls a Frostwyrm's Fury at 40% effectiveness that cannot Freeze enemies. Effect #1 Effect #1 Apply Aura: Modifies Damage/Healing Done Value: 1020% Affected Spells:Item Set: Lingering Phantom's Encasement: 2 piecesObliterate and Frostscythe critical strike damage is increased by 15%10%.
Effect #1 Apply Aura: Modifies Critical Strike Damage Value: 1510% Affected Spells:Item Set: Haunted Frostbrood Remains: 2 pieces
Chaos Strike and Blade Dance have a 20% chance to increase damage you deal by 8%5% for 6 sec. Chaos Strike and Blade Dance critical strikes increase this chance to 40%. Item Set: Skybound Avenger's Flightwear: 4 pieces Raze Raze Maul damage increased by 20% and casting Ironfur or Raze Raze Maul increases your maximum health by 3% for 12 sec, sec, stacking 5 times. Item Set: Strands of the Autumn Blaze: 4 pieces Mongoose Bite Mongoose Bite Raptor Strike, Carve, and Butchery damage increased by 15%.12%. Effect #1 Effect #1 Apply Aura: Modifies Damage/Healing Done Value: 1512% Affected Spells:Item Set: Stormwing Harrier's Camouflage: 2 piecesMongoose Bite Mongoose Bite Raptor Strike, Carve, and Butchery have a 20% chance to make your next Mongoose Bite Mongoose Bite Raptor Strike, Carve, or Butchery cost no10 less Focus and deal 50% increased damage.40% increased damage. Item Set: Stormwing Harrier's Camouflage: 4 pieces
For every 24000 Mana spent on and during Arcane Surge, your spell damage is increased by 1% for 12 sec after Arcane Surge fades, stacking up to 25 times. Your Mana Read more on wowhead.com