Dark crossbow

The Dark Crossbow(not to be confused with Dragon crossbow)is a very strong weapon,one handed weapon that can fire bolts up to Dragon,it requires Level 63 Ranged to wield.They can be obtained as a rare drop from Dark beast,which require 90 Slayer to kill or looted from Kingly Impling,with 91 Hunter.The crossbow is slow(a few bars quicker than it's bow counterpart),so it's not commonly used in Player killing or fighting Bosses,however the damage it can do is always very high,if shot with Dragon bolts.

Special attack
Like the Dark bow,it has a special that can deal 10% more damage and lower the opponent's defence by 10% of the damage done(if the Dark crossbow hits a 20,the opponents defence will lower down by 2 levels).Just like the dark bow the special attack will shoot out 2 bolts that are surrounded by smoke.However,if using Dragon bolts the special attack,the bolts will resemble 2 dragon heads and can deal up to 15% more damage,but still lower the opponent's defence down by 10%.

Market
After it's release the dark crossbow's price started at 1-2M and soon became very popular and was commonly seen wielded by wealthy and high levelled players.After a week the price started to rise up to 16M and the demands increased.As soon as it reached 21M coins,people stopped buying them because it was too expensive and not worth as much as crystal bows and dragon crossbows.The price than dropped down to around 400K,players soon started to drop the crossbows.Merchants could even take advantage of the weapon.After a few months the price slowly started to recover and soon rose up to 1M.Jagex soon updated the weapons appearance and drop rate from Dark beasts,which pushed the price up to it's starting price of 2M.The crossbow than started to slowly rise to the early 3 Millions.

Trivia

 * There was a glitch,when the crossbow was called "null Dcrossbow.exc".
 * The Crossbow is sometimes used as a Pking weapon.
 * The Drop rate of a Dark crossbow is slightly slower than the drop rate of a Abyssal whip from a Abyssal demon.
 * That max hit is reported to be 470.