This short blade weapon forged using dark metals has limited range but comes out fast.
The Dark Dagger is one of the few one-handed Daggers in the game, being only obtainable via Alert Missions. Of the single daggers, the Dark Dagger is unique in its Radiation damage and chance to proc.
See the user build section for builds using this weapon.
Notes
Oddly, the Dark Dagger uses a polarity for its stance slot, which means it will receive less mod capacity from both Pointed Wind () and Homing Fang (), the only two stance mods for daggers. It is recommended that the stance slot be repolarized into the desired polarity if one wishes to keep using the Dark Dagger for optimal modding.
When equipped without a Stance mod, the Dark Dagger adds a 4th lunging stab on its normal attack combo that propels the warframe a good distance forward, which is useful for catching up to moving enemies. It also has a 100% chance of inflicting Slash bleed proc, despite the fact that the Dark Dagger has no physical damage element. This effect is lost if one uses the Pointed Wind stance, which replaces the lunge with a sweeping slash.
If the lunge lands behind an unalerted enemy, a stealth attack will be performed instead.
Tips
This weapon can stun-lock enemies due to its high fire rate.
Because this weapon deals innate Radiation damage, two more combined elemental types can be added to form a three-element build. With a Corrosive and Blast combo, the Dark Dagger can be made into an anti-Grineer weapon capable of defeating Ferrite Armor, Alloy Armor and Machinery. This same build also makes it effective against Corrupted.
Trivia
The Dark Dagger and its longer counterpart the Dark Sword were previously physical damage weapons. Update 13 changed them to deal purely Radiation damage on their normal attacks, making them the first melee weapons to do so.