Study
Spell · ComprehensionNew
Not in Classic
Study
6 sec cast1 hr cooldown
Perform spell research, resulting in a bundle of scrolls. Requires a suitable library.
News
Classic vs Forever
Every talent and spell WoW Forever added, changed or removed, with the Classic tooltip next to the new one.
Mage changes
Arcane
Wand SpecializationRow 2to 1MovedTalent · Arcane
Arcane FocusMax rank 10%to 5%ChangedTalent · Arcane
Improved ChannelingWas Improved Arcane MissilesChangedTalent · Arcane
Arcane SubtletyMax rank 10to 15;40%to 30%; Row1to 2ChangedTalent · Arcane
Magic AbsorptionMax rank 5%to 2%; Ranks5to 2ChangedTalent · Arcane
Arcane ResilienceRow 3to 2; Ranks1to 2ChangedTalent · Arcane
Arcane GeometryWas Magic AttunementChangedTalent · Arcane
Arcane ImpactWas Improved Arcane ExplosionChangedTalent · Arcane
Arcane BlastBlasts the target with energy, dealing 57 to 65 Arcane damage. Each time you cast Arcane Blast, the damage of all your…NewTalent · Arcane
Arcane ShieldingWas Improved Mana ShieldChangedTalent · Arcane
Improved CounterspellRank 1 4 secto 2 secChangedTalent · Arcane
Arcane MeditationMax rank 15%to 50%; Column4to 3; Now needs Arcane ConcentrationChangedTalent · Arcane
Missile BarrageGives your Arcane Blast spell a 40% chance, and your Fireball, Frostbolt, and Frostfire Bolt spells a 20% chance to…NewTalent · Arcane
Arcane MindNo longer needs Arcane ResilienceChangedTalent · Arcane
Arcane InstabilityColumn 2to 3; No longer needs Presence of MindChangedTalent · Arcane
Arcane PowerNeeds Presence of MindChangedTalent · Arcane
Teleport: DalaranTeleports the caster to Dalaran.NewSpell · Arcane
Arcane IntellectIncreases the target's Intellect by 31 for 1 hr.ChangedSpell · Arcane
Conjure FoodRank 6 18to 20ChangedSpell · Arcane- Arcane MissilesMax rank
230to 209ChangedSpell · Arcane 
Dampen MagicMax rank 90to 135;180to 270ChangedSpell · Arcane- Arcane ExplosionMax rank
249 to 270to 239 to 258ChangedSpell · Arcane 
Amplify MagicMax rank 75to 113;150to 225ChangedSpell · Arcane
Remove Lesser CurseRemoves 1 Curse or Bane from a friendly target.ChangedSpell · Arcane
BlinkTeleports the caster 20 yards forward, unless something is in the way. Also frees the caster from Stuns and Immobilizes.ChangedSpell · Arcane
Mage ArmorMax rank 30%to 50%ChangedSpell · Arcane
Arcane BrillianceInfuses the target's party and raid with brilliance, increasing their Intellect by 31 for 1 hr.ChangedSpell · Arcane
Fire
Wake of FireWas Improved Fire Blast; Max rank 1.5 secto 2 sec; Row2to 1; Ranks3to 2ChangedTalent · Fire
IncinerationWas Incinerate; Max rank 4%to 6%; Row3to 1; Ranks2to 3ChangedTalent · Fire
Improved FireballColumn 2to 3ChangedTalent · Fire
ImpactRow 1to 2; Ranks5to 3ChangedTalent · Fire
Burning SoulColumn 4to 1; Ranks2to 3ChangedTalent · Fire
Pyroblast148 to 195to 101 to 131;56to 44ChangedTalent · Fire
Improved ScorchRank 2 66%to 67%ChangedTalent · Fire
Heating UpNon-periodic critical strikes with Fireball, Frostfire Bolt, Fire Blast, and Scorch reduce the cast time of your next…NewTalent · Fire
Master of ElementsYour Fire and Frost critical strikes will refund 30% of their base mana cost.ChangedTalent · Fire
Blast Wave160 to 192to 154 to 184; No longer needs PyroblastChangedTalent · Fire
CombustionWhen activated, this spell causes each of your Fire damage spell hits to increase your critical strike chance with Fire…ChangedTalent · Fire
Frostfire BoltLaunches a bolt of frostfire at the enemy, causing 270 to 314 Frostfire damage, slowing movement speed by 40% and…NewSpell · Fire- FireballMax rank
596 to 760to 425 to 541;76to 60ChangedSpell · Fire 
Fire BlastMax rank 446 to 524to 417 to 489ChangedSpell · Fire
FlamestrikeMax rank 381to 382;340to 332ChangedSpell · Fire
Fire WardMax rank 920to 913ChangedSpell · Fire
ScorchMax rank 237 to 280to 167 to 196ChangedSpell · Fire
Frost
Frost WardingIncreases the Armor and resistance given by your Frost Armor and Ice Armor spells by 30%. In addition, gives your Frost…ChangedTalent · Frost
Elemental PrecisionMax rank 6%to 5%; Ranks3to 5ChangedTalent · Frost
PermafrostRank 1 4%to 3%; Column4to 2ChangedTalent · Frost
FrostbiteColumn 2to 4MovedTalent · Frost
Frost ChannelingRow 4to 3MovedTalent · Frost
Ice LanceDeals 28 to 32 Frost damage to an enemy target. Deals 300% increased damage to Frozen targets.NewTalent · Frost
Improved BlizzardAdds a Chill effect to your Blizzard spell. This effect lowers the target's movement speed by 40% for 1.5 sec.ChangedTalent · Frost
Ice BlockRow 5to 4MovedTalent · Frost
ShatterColumn 3to 4; No longer needs Improved Frost Nova; Ranks5to 3ChangedTalent · Frost
Improved Cone of ColdRank 2 25%to 23%; Column3to 1ChangedTalent · Frost
Cold SnapRow 3to 5ChangedTalent · Frost
Fingers of FrostGives your Chill effects a 15% chance to grant you the Fingers of Frost effect, which treats your next 2 spells cast as…NewTalent · Frost
Winter's ChillRank 4 5to 4ChangedTalent · Frost
Ice Barrier455 damageto 448 damage; Needs Cold SnapChangedTalent · Frost
FrostboltMax rank 515 to 555to 457 to 493ChangedSpell · Frost
Frost NovaMax rank 73 to 82to 72 to 79ChangedSpell · Frost- BlizzardMax rank
1192to 1168ChangedSpell · Frost - Frost WardMax rank
920to 913ChangedSpell · Frost - Cone of ColdMax rank
338 to 368to 328 to 358;50%to 40%ChangedSpell · Frost
Comprehension
What changed during the beta, update by update, is in the patch notes. To try a build, use the talent calculator.