ForeverDiff
Spells /Arcane Concentration
Spell · Arcane · Ranks 1-5

Arcane Concentration

Arcane Concentration was changed in WoW Forever: 5 ranks differ from Classic Era. Rank 1: instant cast, requires level 1 (required level increased from 0 to 1, updated tooltip text, effects and rank text). Pick any rank to compare its tooltip with Classic Era.

Granted by the Mage talent Arcane Concentration. This is the spell it teaches; the talent's own change is on its page.

Spell · Arcane · Rank 1 changed

Arcane Concentration was changed in WoW Forever: required level increased from 0 to 1, updated tooltip text, effects and rank text. Now instant cast, requires level 1. Full tooltip comparison with Classic Era below.

Arcane Concentration tooltip: Classic Era vs WoW Forever

The same tooltip players see in-game, side by side, with each changed line marked.

Classic Era 1.15.9.69722
Arcane Concentration
Rank 1 · Arcane school
Instant
Gives you a 2% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
Forever 1.60.1.69893
Arcane Concentration
Arcane school
Instant
Requires level 1
Gives you a 100% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
changed value added in Forever removed in Forever

Also changed behind the tooltip: effects (not shown in a tooltip line). See the full field diff below for both values side by side.

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Raw field diff every changed column
Field Classic Era Forever
baseLevel 0 1
description Gives you a $h% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by $/10;12536s1%. Gives you a $m1% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by $/10;12536s1%.
effects [ { "amplitude": 0, "aura": 42, "auraPeriod": 0, "basePoints": -1, "chainTargets": 0, "dieSides": 1, "effect": 6, "index": 0, "miscValue": [ 0, 0 ], "realPointsPerLevel": 0, "triggerSpell": 12536, "variance": 0 }, { "amplitude": 0, "aura": 112, "auraPeriod": 0, "basePoints": 0, "chainTargets": 0, "dieSides": 0, "effect": 6, "index": 1, "miscValue": [ 44054, 0 ], "realPointsPerLevel": 0, "triggerSpell": 0, "variance": 0 } ] [ { "amplitude": 0, "aura": 42, "auraPeriod": 0, "basePoints": 100, "chainTargets": 0, "effect": 6, "index": 0, "miscValue": [ 0, 0 ], "realPointsPerLevel": 0, "triggerSpell": 12536, "variance": 0 }, { "amplitude": 0, "aura": 4, "auraPeriod": 0, "basePoints": 0, "chainTargets": 0, "effect": 6, "index": 1, "miscValue": [ 0, 0 ], "realPointsPerLevel": 0, "triggerSpell": 0, "variance": 0 } ]
procChance 2 100
subtext Rank 1 none

Arcane Concentration change history by build

Build Compared to Change
1.60.1.69893 1.15.9.69722 5 fields
1.60.1.69876 1.15.9.69722 5 fields

See every changed record in 1.60.1.69893 →

Spell · Arcane · Rank 2 removed

Arcane Concentration was removed in WoW Forever and only exists in Classic Era. Classic Era spell: instant cast.

Arcane Concentration (Rank 2) tooltip in Classic Era

Present in Classic Era, gone in Forever. The last-known record is shown.

Classic Era 1.15.9.69722
Arcane Concentration
Rank 2 · Arcane school
Instant
Gives you a 4% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
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Arcane Concentration (Rank 2) change history by build

Build Compared to Change
1.60.1.69893 1.15.9.69722 removed
1.60.1.69876 1.15.9.69722 removed

See every removed record in 1.60.1.69893 →

Spell · Arcane · Rank 3 removed

Arcane Concentration was removed in WoW Forever and only exists in Classic Era. Classic Era spell: instant cast.

Arcane Concentration (Rank 3) tooltip in Classic Era

Present in Classic Era, gone in Forever. The last-known record is shown.

Classic Era 1.15.9.69722
Arcane Concentration
Rank 3 · Arcane school
Instant
Gives you a 6% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
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Arcane Concentration (Rank 3) change history by build

Build Compared to Change
1.60.1.69893 1.15.9.69722 removed
1.60.1.69876 1.15.9.69722 removed

See every removed record in 1.60.1.69893 →

Spell · Arcane · Rank 4 removed

Arcane Concentration was removed in WoW Forever and only exists in Classic Era. Classic Era spell: instant cast.

Arcane Concentration (Rank 4) tooltip in Classic Era

Present in Classic Era, gone in Forever. The last-known record is shown.

Classic Era 1.15.9.69722
Arcane Concentration
Rank 4 · Arcane school
Instant
Gives you a 8% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
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Arcane Concentration (Rank 4) change history by build

Build Compared to Change
1.60.1.69893 1.15.9.69722 removed
1.60.1.69876 1.15.9.69722 removed

See every removed record in 1.60.1.69893 →

Spell · Arcane · Rank 5 removed

Arcane Concentration was removed in WoW Forever and only exists in Classic Era. Classic Era spell: instant cast.

Arcane Concentration (Rank 5) tooltip in Classic Era

Present in Classic Era, gone in Forever. The last-known record is shown.

Classic Era 1.15.9.69722
Arcane Concentration
Rank 5 · Arcane school
Instant
Gives you a 10% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.
of 5

Arcane Concentration (Rank 5) change history by build

Build Compared to Change
1.60.1.69893 1.15.9.69722 removed
1.60.1.69876 1.15.9.69722 removed

See every removed record in 1.60.1.69893 →

Read from build 1.60.1.69893 , compared against Classic Era 1.15.9.69722·synced Sep 17, 2026·how we read this →