>>539050721
Yeah. Technically it causes an extra tick of flat dmg based on 30% of ST Electric dmg taken, but effectively it's dmg amplification.
What makes it busted is that it's an extra multiplier. Most modifiers stack additively; if you have +20% dmg from weapon and +20% dmg from attachment set that's +40% dmg, so an extra +20% dmg from a buff would bring your dmg from 1.4x->1.6x which is only a 14% increase, and this also applies to debuffs. Buffs/debuffs do multiply together though; if you have +20% dmg and the enemy has a +20% dmg taken debuff they take 1.44x dmg, or 10% higher than if it were additive. NCharge means you get ANOTHER multiplier on top of those, and with PCharge your dmg is easily doubled or better.
This is how Electric keeps up, because they don't have the crazy supports of Fire or multi-attacks of Water or Def annihilation of Phys.