Diminishing returns means that certain spells and abilities are less effective against player characters if they are used frequently within a short period of time. The table below contains a list of abilities that are affected by DR, and under what circumstances. In addition, DR categories are listed. Effects within same category diminish each other.
When a spell with diminishing returns is used against a target in PvP, the first effect has full duration. Then it diminishes by 50%, then 75%, then the target becomes immune. Spells must be used on the same target within 15 seconds of the *end* of the duration in order to be diminished. In other words, if a target hasn't had a slowing spell active on them for more than 15 seconds, the next slowing spell will have full effect.
Some abilities share diminishing returns—that is, it doesn't matter which one you use; the next time you use an ability in the same category on the same target, its duration will be diminished just as if you had used the exact same ability. These abilities fall into the same category.
Table
| Class | Effect | PvP | PvP Duration (s) |
PvE | PvE Duration (s) |
DR Category |
|---|---|---|---|---|---|---|
| Death Knight | Gnaw (Pet) | Yes | 3 | Yes | 3 | Controlled Stun |
 [Hungering Cold] |
Yes | 10 | No | 10 | Disorient | |
 [Strangulate] |
Yes | 5 | No | 5 | Silence | |
| Druid |   [Bash] |
Yes | 4-5 | Yes | 4-5 | Controlled Stun |
 [Cyclone] |
Yes | 6 | Yes | 6 | None | |
 [Entangling Roots] |
Yes | 10 | No | 27 | Controlled Root | |
 [Hibernate] |
Yes | 10 | No | 40 | Disorient | |
 [Maim] |
Yes | 1-5 | Yes | 1-5 | Controlled Stun | |
 [Pounce] |
Yes | 3-4 | No | 3-4 | Opener Stun | |
| Hunter |  [Chimera Shot] (Scorpid) |
Yes | 10 | No | 10 | Disarm |
 [Entrapment] |
Yes | 4 | No | 4 | None | |
 [Freezing Trap] |
Yes | 10 | No | 20 | Disorient | |
 [Pin] (Pet) |
Yes | 4 | No | 4 | Controlled Root | |
 [Scare Beast] |
Yes | 10 | No | 20 | Fear | |
 [Scatter Shot] |
Yes | 4 | No | 4 | None | |
 [Intimidation] |
Yes | 3 | Yes | 3 | Controlled Stun | |
 [Ravage] (Pet) |
Yes | 2 | Yes | 2 | Controlled Stun | |
 [Silencing Shot] |
Yes | 3 | No | 3 | Silence | |
 [Sonic Blast] (Pet) |
Yes | 2 | Yes | 2 | Controlled Stun | |
 [Snatch] (Pet) |
Yes | 6 | No | 6 | Disarm | |
 [Wyvern Sting] |
Yes | 6 | No | 30 | Disorient | |
| Mage |  [Deep Freeze] |
Yes | 5 | Yes | 5 | Controlled Stun |
 [Dragon's Breath] |
Yes | 5 | No | 5 | Disorient | |
| Freeze (Pet) | Yes | 8 | No | 8 | Controlled Root | |
 [Frost Nova] |
Yes | 8 | No | 8 | Controlled Root | |
 [Frostbite] |
Yes | 5 | No | 5 | Random Root | |
 [Impact] |
Yes | 2 | Yes | 2 | Random Stun | |
 [Improved Counterspell] |
Yes | 4 | No | 4 | Silence | |
 [Polymorph] |
Yes | 10 | No | 50 | Disorient | |
 [Shattered Barrier] |
Yes | 8 | No | 8 | Random Root | |
 [Slow] |
No | 15 | No | 15 | None | |
| Paladin |  [Hammer of Justice] |
Yes | 6 | Yes | 6 | Controlled Stun |
 [Holy Wrath] |
Yes | 3 | Yes | 3 | Controlled Stun | |
 [Repentance] |
Yes | 6 | No | 60 | Disorient | |
 [Seal of Justice] |
Yes | 2 | Yes | 2 | Random Stun | |
 [Turn Evil] |
Yes | 10 | No | 20 | Fear | |
 [Shield of the Templar] |
Yes | 3 | No | 3 | Silence | |
| Priest |  [Psychic Scream] |
Yes | 8 | No | 8 | Fear |
 [Mind Control] |
Yes | 10 | No | 60 | None | |
 [Psychic Horror] |
Yes | 3 | No | 3 | Horror | |
| [Psychic Horror] (Disarm Effect) |
Yes | 10 | No | 10 | Disarm | |
| [Shackle Undead] |
Yes | 10 | No | 50 | Disorient | |
 [Silence] |
Yes | 5 | No | 5 | Silence | |
| Rogue |  [Blind] |
Yes | 10 | No | 10 | Fear |
 [Cheap Shot] |
Yes | 4 | No | 4 | Opener Stun | |
 [Dismantle] |
Yes | 10 | No | 10 | Disarm | |
 [Garrote] |
Yes | 3 | No | 3 | Silence | |
 [Gouge] |
Yes | 4-5.5 | No | 4 | Disorient | |
 [Improved Kick] |
Yes | 2 | No | 2 | Silence | |
 [Kidney Shot] |
Yes | 2-6 | Yes | 6 | Controlled Stun | |
 [Sap] |
Yes | 10 | No | 60 | Disorient | |
| Shaman | [Bash] (Pet) |
Yes | 2 | Yes | 2 | Controlled Stun |
| Storm, Earth and Fire | Yes | 5 | No | 5 | Controlled Root | |
 [Frost Shock] |
No | 8 | No | 8 | None | |
 [Stoneclaw Totem] |
Yes | 3 | Yes | 3 | Random Stun | |
 [Hex] |
Yes | 10 | No | 30 | Disorient | |
| Warlock |  [Banish] |
Yes | 6 | No | 30 | None |
 [Death Coil] |
Yes | 3 | No | 3 | Horror | |
 [Demon Charge] |
Yes | 3 | Yes | 3 | Controlled Stun | |
 [Fear] |
Yes | 10 | No | 20 | Fear | |
 [Howl of Terror] |
Yes | 8 | No | 8 | Fear | |
| Intercept (Felguard) | Yes | 3 | Yes | 3 | Controlled Stun | |
 [Seduction] |
Yes | 10 | No | 15 | Fear | |
 [Shadowfury] |
Yes | 3 | Yes | 3 | Controlled Stun | |
 [Spell Lock] |
Yes | 3 | No | 3 | Silence | |
| Warrior |  [Charge] |
No | 1.5 | No | 1.5 | None |
 [Concussion Blow] |
Yes | 5 | Yes | 5 | Controlled Stun | |
 [Disarm] |
Yes | 10 | No | 10 | Disarm | |
 [Gag Order] |
Yes | 3 | No | 3 | Silence | |
 [Intercept] |
Yes | 3 | Yes | 3 | Controlled Stun | |
 [Hamstring] |
No | 10 | No | 15 | None | |
| [Improved Hamstring] |
Yes | 5 | No | 5 | Random Root | |
 [Intimidating Shout] |
Yes | 8 | No | 8 | Fear | |
 [Shockwave] |
Yes | 4 | Yes | 4 | Controlled Stun | |
| Racial |  [Arcane Torrent] |
Yes | 2 | No | 2 | Silence |
| [War Stomp] |
Yes | 2 | Yes | 2 | Controlled Stun |
- Controlled Root - Freeze (Water Elemental), Pin (Crab), Frost Nova, Entangling Roots, Earthgrab (Storm, Earth and Fire)
- Controlled Stun - Bash, Concussion Blow, Deep Freeze, Demon Charge, Gnaw, Holy Wrath, Inferno Effect (Doomguard summon), Hammer of Justice, Intercept (Felguard), Intercept (Warrior), Intimidation, Kidney Shot, Maim, Ravage, Shadowfury, Shockwave, Sonic Blast, War Stomp
- Disarm - Chimera Shot - Scorpid, Disarm, Dismantle, Psychic Horror (Disarm effect), Snatch
- Disorient - Dragon's Breath, Freezing Arrow, Freezing Trap, Gouge, Hex, Hibernate, Hungering Cold, Polymorph, Repentance, Sap, Shackle, Wyvern Sting
- Fear - Blind, Fear (Warlock), Howl of Terror, Intimidating Shout, Psychic Scream, Scare Beast, Seduction (Pet), Turn Evil
- Horror - Death Coil, Psychic Horror
- Opener Stun - Cheap Shot, Pounce
- Random Root - Frostbite, Improved Hamstring, Shattered Barrier
- Random Stun - Impact, Revenge Stun, Seal of Justice, Stoneclaw Stun
- Silence - Arcane Torrent, Gag Order (Warrior talent), Garrote, Improved Counterspell, Nether Shock, Silencing Shot, Improved Kick, Shield of the Templar, Silence (Priest), Spell Lock, Strangulate
- Taunt - Angered Earth, Challenging Howl, Challenging Roar, Challenging Shout, Dark Command, Death Grip, Distracting Shot, Growl (Druid), Hand of Reckoning, Mocking Blow, Righteous Defense, Taunt (Pet),Taunt (Warrior)
Banish, Charge, Cyclone, Entrapment, Scatter Shot, and Mind Control are on diminishing returns with themselves.
Diminishing Returns in PvE
Many types of crowd control also suffer from diminishing returns versus NPCs. Diminishing returns do not count per player but per creature; every creature has its own diminishing return for each group of CC and all players in your party / raid will be affected by that diminishing return.
Patch changes
Patch 3.3.0 (2009-12-08): Taunt Diminishing Returns: We've revised the system for diminishing returns on Taunt so that creatures do not become immune to Taunt until after 5 Taunts have landed. The duration of the Taunt effect will be reduced by 35% instead of 50% for each taunt landed. In addition, most creatures in the world will not be affected by Taunt diminishing returns at all. Creatures will only have Taunt diminishing returns if they have been specifically flagged for that behavior based on the design of a given encounter. - Template:Patched
- Patch 3.0.8 (2009-01-20): All Silence spells now have diminishing returns. This includes: [Arcane Torrent], [Garrote] silence effect, [Improved Counterspell] effect, [Improved Kick] effect, [Silence], [Gag Order], [Silencing Shot], [Spell Lock], and [Strangulate].
- Patch 3.0.2 (2008-10-14): Melee mitigation stats also have diminishing returns.
- Patch 2.3.0 (2007-11-13):
- [Blind] is now a physical (no longer a poison) attack. Reagent requirement removed. Now shares the same diminish category as [Cyclone] and is now diminished in PvE as well as PvP.
- Riposte is now subject to diminishing returns in PvP.
- [Frost Shock] is no longer subject to diminishing returns.
- [Unstable Affliction]: The silence from this ability is now subject to diminishing returns.
- [Disarm] is now subject to diminishing returns in PvP.
- Patch 2.1.0 (2007-05-22):
- [Entrapment] (Survival): Effect duration reduced to 4 seconds and is now subject to diminishing returns in PvP.
- [Frostbite] effect is now subject to diminishing returns in PvP.
- [Death Coil] is now is now subject to diminishing returns in the Horror category.
- Reputation: Players will experience diminished gains in reputation from killing outdoor mobs while in raids larger than five players.
- Patch 1.9.0 (2006-01-03): The stun effect's duration no longer diminishes or is diminished by controlled stun abilities and spells:
- Patch 1.4.0 (2005-04-19): A handful of spells were added to the list of spells subject to diminishing returns in PvP. It is our goal to set as few spells as possible to be diminished. We've identified this short list of spells as having durations and cooldowns sufficient to almost permanently slow or immobilize targets but without adequate controls or other limiting factors. When a spell with diminishing returns is used against a target in PvP, the first effect has full duration. On the second use of the same category of spell (e.g. slowing), that spell's duration is reduced by 50%. On the third use, the duration is reduced by 75%. On the fourth attempt, the target becomes immune to the spell. Spells must be used on the same target within 15 seconds of the *end* of the duration in order to be diminished. In other words, if a target hasn't had a slowing spell active on them for more than 15 seconds, the next slowing spell will have full effect. The list of affected spells is:
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