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FYPassive1.png [Passive] Enhances your proficiency and understanding of your arsenal.
If no Grenade Skill has been used yet, the cost of the next Grenade Skill is reduced.
Arsenal Reinforcement
  • Increases the retention time of loaded attributed bullets.
  • Increases the effect duration of attributed bullets.
  • Allows you to reload/use grenade skills in midair.
Attributed Bullets
Grenade Skills


Class Level Required
Freyja 35

Skill Information

Skill Level Level Required Attributed Bullets Grenade Skills
Retention Time Increase Burn, Ice Effect Duration Increase Reload Amount
(When used in the air)
MP Usage Decrease
1 35 2 seconds 5% -3 2.5%
2 51 3 seconds 7.5% -2 5%
3 59 4 seconds 10% -1 7.5%
4 93 5 seconds 12.5% 10%

Tips and Details

  • While the MP cost reduction only applies to the first Grenade skill when none have been loaded yet, the loading count reduction will apply regardless whenever one is cast in the air.
    • As Key of Proof increases damage based on where a grenade is thrown from, loading up grenade skills in midair provides no overall benefit and should be avoided whenever possible to not lose out on one additional hit.


  • While the effects are drastically different, the passive is overall based on DFO's Female Spitfire passive Arsenal Reinforcement, enhancing the elemental effects of certain skills in some way.


Date Changes
02/18/2016 07/13/2016
  • Arsenal Reinforcement added.
02/25/2016 -
  • If there's no grenades loaded, the next grenade skill will have its cost decreased.
  • MP gain of all attacks increases when using attributed bullets.
04/27/2017 05/10/2017
  • Grenade MP Usage Decrease decreased.
08/23/2018 09/06/2018
  • MP Gain Increase effect removed.
04/25/2019 05/22/2019
  • Retention Time Increase decreased.

Alternative Names

Server Name Translation
  South Korea 병기강화 Arsenal Reinforcement
  China (Simplified Chinese) 弹药强化 Ammo Enhancement
  France Renforcement des armes Weapon Reinforcement
  Brazil Arsenal Reforçado Reinforced Arsenal

Freyja Skills
Hyper Active
Special Active
  Neil Sniping       C4 Remote Control       Photon Bomb       G-96 Pressure Grenade       Penetrating Bullet       M18A1 Claymore       Viper Shower       Einherjar
  Blazing Bullet       Phantom Chaser       Phantom Shot
  Arsenal Reinforcement       Key of Proof       Quarter Master       Awakened Will: Freyja       Awakened One       Enhance Equipment