As with all other polearms, the noxious halberd has a range of two tiles. Its most notable traits are that it attacks on a 5-tick cycle rather than 7, has more slash and strength bonus compared to the crystal halberd and has a 33% chance (50% with a Serpentine helm equipped) to envenom the target (if not venom immune).
The noxious halberd will always deal the player's max hit when hitting the acidic, mirrorback, and ruptura araxytes that hatch during the fight with Araxxor. It can also deal full damage to the Corporeal Beast when on the stab attack style.
A player performs the noxious halberd's special attack, Virulence.
The noxious halberd has a special attack, Virulence, which consumes 50% of the wielder's special attack energy. Virulence can only be used if the player is afflicted with poison or venom, and instantly cures the condition; attempting to use the special attack while not poisoned/venomed will give the message You can only use this special attack whilst you are poisoned.. The player's next accurate attack with the halberd will have its minimum hit increased by the damage the player would have taken from their cured affliction. This effect is lost if the player changes weapon or logs out.
For example, a poisoned player who is poised to take 16 poison damage can use Virulence to cure themselves, and their next accurate attack will do a damage roll between 16 and their max hit.
Note that Virulence does not give any period of immunity towards poison and venom.
Early design explorations of the noxious halberd, by Mod Skylark.
Trivia
The process to create the weapon is similar to that of the abyssal bludgeon; both items require the player to obtain three untradeable pieces in order to create said item.