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.

The weapon, along with the brine sabre, deals more damage and is more accurate against the 'Rum'-pumped crabs, and before the Evolution of Combat, was able to hit even higher than the chaotic rapier. Occasionally while fighting them, a message appears saying "The brackish blade seems super-effective."

Dropping monsters

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Trivia

 * Before the Evolution of Combat, this weapon used to have a special attack which would double the chance of hitting, and added 2.5% of the damage dealt to your 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.
 * Brackish is a term used to describe water which is a mix of fresh water and salt water.
 * This item lost much in value since the removal of special attack, all the way from ~500k down to ~60k.
 * Even if one cannot reach the monster that drop this weapon without a quest, they may obtain it from the Grand Exchange or another player.
 * 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 Pokemon where one Pokemon has a combat style that is more effective against an other combat style.