Opportunist

Opportunist (passive, lvl 1)
The law of the jungle dictates that there is always something stronger; with this, that might as well be you!

Deal 1.5 times more damage to enemies that have their guard lowered. When used with a crit, the max damage multiplication will be 2.5. No, you are not breaking the game that easy, mister!

Opportunist has been reworked.
Opportunist (passive)

Deal an additional 10% (+9% per skill lvl) damage against enemies with their guard lowered to you. Attacks made from stealth count as attacks against an enemy with their guard lowered. This effect can’t happen more than once every 2 minutes.