POISONING
"Injected Strike" will prompt you to select a Poison Potion (any Poison, even Parasitic or Darkglow) to use on your currently equipped weapon (this works on any weapon, including Bows), granting it multiple Poison Charges (you still have to pass a Poisoning skill check though, which fails a lot).
Once your weapon is poisoned, using Injected Strike again will cause your next successful attack to poison the victim and reduce their Poison Resist by 30% (PvM) or 15% (PvP) for 4 seconds at GM Poisoning/120.0 Anatomy. You can even queue a Weapon Special at the same time, for example you can deliver an AI from a Composite Bow that will simultaneously DP your target.
Even without having Anatomy, Nox Mages can make use of Injecting Strike with a Mage Weapon.