SCP-513 is a unremarkable rusty cowbell. No marks or engravings are visible on its surface due to the large amount of corrosion. Attempts to remove the rust chemically or mechanically have had no success. Any noise produced by SCP-513 immediately induces strong anxiety in all sentient being who hears it regardless of their previous mental status. Exposure victims report feelings of being watched by an unseen entity and present elevated heart rates and blood pressure.

Classification: Euclid Class Anomalous object

Powers and Abilities: Superhuman physical characteristics, can increase heart rate and blood pressure and induces strong anxiety in all sentient beings who hear it, SCP-513-1 is invisible to the ones not exposed. Summons SCP-513-1 when used|Possibly teleportation(Can seemingly disappear without a trace)

Attack Potency: Unknown(Can increase blood pressure and heart rate and cause strong anxiety to the subjects who hear it)

Speed: Below Average Human level(Immobile on its own)

Durability: Unknown

Range: Standard melee range

Standard Equipment: None notable

Intelligence: Mindless|Animalistic

Weakness: Virtually defenseless unless rung.