Brackish blade

The brackish blade is a one-handed weapon that requires 60 Attack to wield. It is dropped by 'Rum'-pumped crabs in the Braindeath Island 'Rum'-geon that is unlocked during the quest A Clockwork Syringe. This weapon has a special attack.

The weapon, along with the brine sabre, deals more damage and is more accurate against the 'Rum'-pumped crabs. Occasionally while fighting them, a message appears saying "The brackish blade seems super-effective."

Special attack
The brackish blade's special attack is 'Rum'ify. This attack has double accuracy and adds 2.5% of the damage dealt to the wielder's Strength, Attack and Defence. For example if you hit 200, this means your Strength, Attack and Defence would all get a visible 5 level boost.

Trivia

 * Brackish is a term used to describe water which is a mix of fresh water and salt water.
 * Before the Evolution of Combat, the Brackish Blade was nearly identical to the dragon scimitar in stats, other than having slash and stab attributes switched.
 * The message saying "The brackish blade seems super-effective" is a reference to the series, where an attack is considered 'super effective' if it has a type advantage over its target.