|Release date||6 June 2016 (Update)|
|Always drops||Green partyhat|
|A vengeful spirit back from beyond the Black Hole.|
Durial321 is a player spoof found in Falador within tournament worlds during the World 666 event. He attacks with his abyssal whip and is able to cast Ice Barrage. Upon death, he will always drop a green partyhat which is awarded to the player who dealt the most damage.
The NPC's name and appearance reference the most infamous player involved in the Falador Massacre on June 6, 2006.
- In June 2016, in the days leading up to and during the event, Durial321 would appear to laugh at the player in a vision while a green partyhat spawned on the ground nearby.