This short blade weapon has limited range but comes out fast and can inflict fire damage.
The Heat Dagger is a dagger whose blueprint is exclusive to Alert missions. Specializing in Puncture damage, its signature trait is the ability to create a blast of fire when slammed into the ground. This combination of Fire and Puncture lets the Heat Dagger have utility against most of the Grineer, effective against both armored and light units.
Color customization is limited to only Primary and Energy color, and the handle/grip cannot be colored. The other selections have no effect.
With Valkyr under her Hysteria ability, you can still deal the AoE fire blast upon slamming the ground.
When equipped without a Stance mod, the Heat Dagger adds a 4th lunging stab on its normal attack combo, which 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 on contact. 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.