Dark blade

This sword is wielded by Lord Darthon during the Darkness Saga. Once you have defeaten Darthon (level 289) he will drop his Blade which you can take as a reward.

the Dark Blade is a very strong weapon with a paralysing powerful special attack which is a magic attack that can go through prayer.

Darkness Saga Quests:

The Questmaster (Experienced)

Darkness of Darthon (Master)

Battle for Gilienor (Grandmaster)

Rewards:

The Questmaster: 2 experience lamps containing 20,000 experience, Access to Darthon, 200 noted Mithril ore, 50000 coins.

Darkness of Darthon: 2 experience lamps containing 50,000 experience, Access to Viligad, 200 noted adamant ore, 200,000 coins, Access to Lightness Magics and Prayers (Prayer's if you fully restore Lord Viligad), Broken Blade.

Battle for Gilienor: 4 experience lamps containing 125,000 experience, access to rename and rule Darthon, 200 noted Runite Ore, Access to mine Dragonite ore located under Darthon, Dark Blade, 1,000,000 coins and a powerful soul fragment amulet, also access to more lightness prayers and magics and Soul Magics.

The Dark Blade is Simular to the Korasi sword, Korasi's attack is better but the Dark Blade's Special attack is better.

If you give the Dark Blade to Viligad, he will offer you 10,000,000 coins. but you will not beable to get another one unless you buy it back for 15,000,000 coins.