Morrigan's javelin

Morrigan's javelin is a ranged weapon exclusive to Deadman seasonals, requiring 78 Ranged to wield. It is part of Morrigan's equipment, a set of Ancient Warriors' equipment, and is dropped by any monster found in the Wilderness as part of a global loot table, the chance being relative to the combat level of the monster.

Unlike other javelins, they cannot be used with ballistae and are a standalone weapon.

Special attack
Morrigan's javelin has a special attack, Phantom Strike, that consumes 50% of the player's special attack energy and applies a damage over time effect to the opponent after the special attack is performed. This special attack has no effect on NPCs.

Every 3 ticks (1.8 seconds) after the special attack is performed, the opponent will take an additional 5 hitpoints of damage until the same damage dealt by the special attack has been delivered. When this occurs, the target will receive a message in their chatbox stating "You start to bleed as a result of the javelin strike." Subsequent damage will result in the chatbox stating "You continue to bleed as a result of the javelin strike."

Trivia

 * Ancient Warriors' equipment were originally added in a 2008, a year after the backup of Old School RuneScape.