Key of Proof

From Elwiki
FYPassive2.png [Passive]
Magical Attack Power is increased.
Enhances the key part of the nitro motor and ensures safety in the air, allowing precise aim.
Key Part Enhanced
  • While in the air, damage is increased upon skill use.
  • While in the air, MP consumption upon skill use is decreased.


Class Level Required
Freyja 60

Skill Information

Skill Level Level Required Magical Attack Increase Skills Used in Midair
Damage Increase MP Reduction
1 60 6% 10% 5%
2 66 9% 10%
3 68 12% 15%
4 99 15% 20%
1 60 2.4% 5% 2.5%
2 66 3.6% 5%
3 68 4.8% 7.5%
4 99 6% 10%

Tips and Details

  • For any skills that can be set up in advance, like the loading of Grenades or setting up C4 Remote Control, the damage increase is applied based on where each individual cast is used from, not where you load up or detonate them from.



Date Changes
02/18/2016 07/13/2016
  • Key of Proof added.
04/27/2017 05/10/2017
  • Damage Increase decreased.
  • MP Reduction decreased.
04/25/2019 05/22/2019
  • Damage Increase increased.
  • MP Reduction increased.
  • None
08/01/2019 08/28/2019
  • Damage Increase decreased.
  • Damage Increase increased.
  • None
12/23/2021 01/12/2022
  • Damage Increase in Air decreased.
  • Added an effect that increases Magical Attack Power.

Alternative Names

Server Name Translation
Korean Flag.png South Korea 증명의 열쇠 Key of Proof
Chinese Flag.png China (Simplified Chinese) 滞空掌握 Flight Training
German Flag.png Germany Beweisschlüssel Key of Proof
Spanish Flag.png Spain Llave testimonio Key of Proof
French Flag.png France Clé de preuve Key of Proof
Italian Flag.png Italy Chiave di prova Key of Proof
Polish Flag.png Poland Klucz dowodowy Proof Key
English Flag.png United Kingdom Proof Key
Brazil Flag.png Brazil Chave dos Céus Key of the Skies