|Release date||12 December 2006 (Update)|
|Quest NPC?||Animal Magnetism|
|Location||West of Port Phasmatys|
|Notable features||Player spoof.|
|He hates cows so much.|
Cow31337Killer is a spoof of an adventurer occurring during the Animal Magnetism quest. He kills an undead cow, and attempts to kill an undead chicken during a cutscene. He is shooed away and can't kill the chicken. He is combat level 123, and wears rune armour with a Dharok's helmet and a Dharok's greataxe. His name appears to be "Cow Elite Killer" in Leetspeak.
- Previously, this NPC was known as Cow1337Killer.