Swift Momentum is an aura mod that increases Heavy Attack Windup Speed and extends the duration of the Melee Combo Counter.


Rank Heavy Attack Windup Speed Combo Duration Cost *
0 +5% +1 sec -2
1 +10% +2 sec -3
2 +15% +3 sec -4
3 +20% +4 sec -5
4 +25% +5 sec -6
5 +30% +6 sec -7

* Aura mods increase the amount of Mod Capacity

Drop Locations[]

Mission Drop Tables

Mission Type Source Rotations
Drop Table
Chance[1] Quantity[2] Avg. per roll[3] Star Chart Nodes
Arbitrations Arbitrations C 3.5% 1 0.035

See in-game World State Window, must complete all nodes on Star Chart

Enemy Drop Tables

Enemy Drop Table Chance[4] Item Chance[5] Chance[6] Expected Kills[7] Quantity[8] Avg. per roll attempt[9]

Sourced from the official drop table repository. See Module:DropTables/data to edit on the wiki.


  • Heavy Attack Wind Up Speed is calculated similarly to Reload speed[citation needed]:
    Modified Wind Up Speed = Base Wind Up Speed ÷ (1 + Wind Up Speed Bonus)
  • This mod does not affect the Heavy Attack Windup Speed of Exalted Ironbride. Whether it affects the Combo Duration is unclear; while Ironbride does have a listed combo duration of 5.0 seconds in the Arsenal's panel, there is no combo counter displayed in the UI while using Ironbride, and thus no way to easily check.


  • Prior to Update 26.0 (2019-10-31), this mod provided an increase in Charge Attack Speed along with an increase in combo duration.
    • Charge Attack Speed was calculated similarly to Reload speed[citation needed]:
      Modified Charge Attack Speed = Base Charge Attack Speed ÷ (1 + Charge Attack Speed Bonus)
      • For example, a typical charge attack requires 1 second, and with 30% bonus, charge attack will take:
        1 ÷ (1 + 30%) = 0.7692 seconds[citation needed]

Patch History[]

Hotfix 26.0.5 (2019-11-06)

  • Changed Swift Momentum Mods description from Charged Attack Speed to Heavy Attack Windup Speed.

Hotfix 25.7.6 (2019-09-18)

  • Introduced.

See Also[]

  1. Chance to roll item within drop table
  2. Amount rewarded on successful roll
  3. (Quantity × Chance)
  4. Chance to roll drop table
  5. Chance to roll item within drop table
  6. (Drop Table Chance × Item Chance)
  7. (1 / Chance), see WARFRAME Wiki:Expected & Nearly Guaranteed Numbers for more details
  8. Amount rewarded on successful roll
  9. (Quantity × Chance), average item quantity on a roll attempt (successful or not)