Ultra Optical Investigation

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[Passive] Through improved optical research, Spectrum switching becomes more swift and cooldown is reduced to 0.5 seconds.
Additional Force Field: Reactive (Green)
  • Use El Crystal Spectrum skill key to switch.
  • Electron/Beam attacks become piercing and homing attacks.


Class Level Required
Code: Battle Seraph 35

Skill Information

Skill Level Level Required Amplification Size Increase Critical Rate using Field
1 35 10% N/A
2 51 20%
3 59 30%
4 93 10%

Reactive Mode Information

Max Hits Beam/Electron
Ball Damage
x2 x0.55

Tips and Details

  • In this mode, all El Crystal Spectrum-affected combos will generate a force field which will give the projectile a homing property and a decrease in MP regeneration. Projectiles will have increased range.
    • After going through the force field, projectiles will become smaller and faster if a beam. Beams will be broken up into several smaller beam-like projectiles (the number of homing beams is dependent on the number of hits in normal mode), and only Electron balls/Beams/Electrons gain piercing property (meaning Electron balls/Beams/Electrons can hit twice)at 55% damage; this amounts to an approximate 10% boost in damage with attacks affected. Penetration Electrons (Taser Pilum, Energy Needles) will only hit once at 110% damage. Electron triangles can also deal multiple hits. Only Sweep Rolling can deal full damage to multiple targets.
  • When switching the type of spectrum, movement and the freezing is gone.
    • This means that you only do the 'snap' that changes mode for activating the skill. Changing of mode no longer 'snaps'.
    • Eve can also now change modes in midair.
  • When targets are not within homing range, the lasers will scatter out randomly.
  • The extra hits done may connect to a nearby enemy, further extending the range of the beams.
    • For example, if the range of the beam is 700, then it will connect to a nearby enemy within 700 range of the primary target.


  • In NA, Induction Mode is renamed to Reactive Mode.


  • 02/05/2015 KR
    • Amplification Size Increase decreased.

Alternative Names

Server Name Translation
Korean Flag.png South Korea  ???? Hyper Optical Research
Japanese Flag.png Japan 超光谱研究 Ultra Spectrum Research
Chinese Flag.png China (Simplified Chinese) 超光学研究 Ultra Optical Research
French Flag.png France Recherche hyperoptique Hyper Optical Research
English Flag.png United Kingdom Hyper Optic Research

Code: Battle Seraph Skills
Hyper Active
PAEM.png Psychic Artillery
Special Active
Linear Divider.png Linear Divider     BSSActive1.png Energy Needles     ThousandsofStars.png Thousand Star     BSSActive2.png Energetic Heart
Tesla Shock.png Tesla Shock : Spear     BSActive1.png Taser Pilum
HOR.png Ultra Optical Investigation     HPE.png High-power Electronic Circuit     AdvancedElEnergyReactor.png El Energy Reactor