Glowing dagger

The glowing dagger is a quest item obtained and used during the Legends' Quest.

It is created when you are given the dark dagger by Echned Zekin, requesting that you take the hat, which is actually Viyeldi, then use the dagger on it; it will kill him and will convert the dark dagger into a glowing dagger.

If you have dropped your glowing dagger after completing the quest, it can be reobtained by returing to the Kharazi Dungeon and going to the room with the winch, which requires casting a Charge Orb spell on the door to enter. Smash the barrels in the room to retrieve it.

Trivia

 * Disregarding fun weapons, the glowing dagger is the weakest melee weapon in Runescape, tied with its dark equivalent.
 * It was the first weapon to glow in RuneScape.

† Glowing dagger