Abyssal Whip

The Abyssal whip is a powerful one-handed Melee weapon that requires level 70 Attack to wield. The Abyssal Whip is widely used in PvM because of its quick attack speed and Strength bonus. However, they are rarely used in PvP because of their lack of effective damage, due to most chaotic equipment dealing more damage in less time. They are obtainable from Crystal Chest, or trading with another player.

There are also coloured versions of the Abyssal Whip. They exist in four different colours.

Special attack
The Abyssal Whip has a special attack, known as Energy Drain. This uses 50% of your special attack bar, and causes the opponent to transfer 25% of their energy to your energy. When using the Abyssal Whip special attack on an opponent wielding a Divine or Elysian Spirit Shield, the shields' effect will not work for 50 hits - the effect cannot stack up!

Trivia

 * Abyssal Whips are one of the most common rewards from the Crystal Chest and aren't really that valuable.