SCP Foundation After Midnight Radio - SCP-513-1 is a tall slender being you will only see if you ring the cowbell that is SCP-513. It'll follow you and haunt you until it
The Haunted Cowbell... | SCP-513 (SCP Animation) - YouTube
SCP-513 song (A Cowbell) - YouTube
New model for SCP-513-1 - Undertow Games Forum
SCP-513 - Fondazione SCP
Took about 4 years, but I can give SCP-513 to my friend now. : r/SCP
Alpine Hex (SCP-513 "A Cowbellโ Fanart) - SCP Foundation
Stream SCP-513-1 song by SCP-S4S | Listen online for free on SoundCloud