The Bane of the Trapped legendary gem has the effect:

Increase damage against enemies under the effects of control-impairing effects by 15.00%.

Per numerous other sources, Slow Time counts as a "control-impairing effect."

The Slow Time: Time Warp rune states the following:

Enemies caught in the bubble of warped time take 15% more damage.

How does this damage bonus combine? Is it additive or multiplicative?

  • 1
    Bane of the Trapped is multiplicative, don't know about bubble, but it should also be multiplicative. Don't have sources to cite, so leaving this as a comment.
    – Elise
    Commented Nov 22, 2015 at 11:39

1 Answer 1


I have seen a thread on Battle.net, attributing the information to some other site. The information can be obsolete, as it seems to date back to 2.0.6.

All buffs are separated into several classes. Buffs in the same class are additive, classes are multiplicative.

Class A : regular buffs/debuffs/skills

  • A1 : Self buffs towards sheet dps - Glass Cannon, Hexing pants, MW, Familiar, BH-SS etc.
  • A2 : Most classical debuffs towards mobs - Strongarms, EE, Cold Blooded etc.
  • A3 : Every skill damage except Hydra - MM%, BH% etc.

Class B : elemental & pets

  • B1 : Elemental damage %
  • B2 : Pet % (MoJ and Enforcer)

Class C : elitist affixes

  • Damage dealt to elites / beasts / demons / humans is increased by %

Class D : Bane of the Trapped

Class E : Zei's Stone of Vengeance

Class F : Audacity

Class G : Hydra damage %

  • Hydra damage - unlike all other skill%, Hydra is not in the buff/debuff class A.

So, your final damage bonus would be

A*B*C*D*E*F*G, A = A1+A2+A3, B = B1+B2

So, in your question BoT is definitely multiplicative with Time Warp (it is with everything), the question is - which other buffs you already have in class A, that would decrease Time Warp's effectiveness. I am playing a Del'Rasha Wizard, so I always have +100% Meteor damage on Nilfur's Boots. Thus, Time Warp adds at most 7.5% to my damage.

  • I was with you until the last paragraph. I play a Delsere/Vyr's hybrid so I didn't get why something would reduce Time Warp's effectiveness?
    – Troyen
    Commented Nov 23, 2015 at 9:17
  • @Troyen Something would reduce Time Warp's effectiveness by adding more buffs to class A (as I assume Time Warp falls into A2). In my example, if I always have +100% damage in A3, adding Time Warp makes class A +115%, which is only 7,5% better. In your case I do now know how Archon buffs work. If they are class A, you are in the same boat as me (or worse, if you easily pass +100% mark). That said, do you see Archon bonus anywhere in the character sheet? (I didn't play Archon in, like, forever)
    – Orc JMR
    Commented Nov 23, 2015 at 10:58
  • Archon stacks do modify my character sheet damage number.
    – Troyen
    Commented Nov 24, 2015 at 4:56
  • @Troyen Then, unfortunately, they fall into A1, progressively making Time Warp less and less significant :-( At least under model described, we can always hope it's wrong :-)
    – Orc JMR
    Commented Nov 24, 2015 at 21:09

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