Per 
SCP-582:
Object Class: Euclid
Special Containment Procedures:
SCP-582 is to be contained in a standard 6ft by 6ft humanoid containment cell. Under no circumstances are any vampiric entities nor any vampire costumes to be present in the chamber at any time. Likewise, neither are any invisible entities allowed within the chamber. Absolutely no Foundation personnel nor any humanoid entities are to come into contact with SCP-582-3 under any circumstances or at any time. All instances of SCP-582-4 are to be restrained and sedated. All instances of SCP-582-4 are to be terminated after 72 hours. Under absolutely no circumstances is SCP-582-3 to be removed from the line of sight of SCP-582-1. SCP-582-3 is to be kept in a sealed reinforced glass container at all times. Only Foundation personnel with Level 4 clearance are to be granted access to SCP-582.
Description:
SCP-582-1 and SCP-582-3 were recovered together in █████, Japan, on █/█/198█.
SCP-582 consists of three entities. SCP-582-1 is a 17 year old Japanese schoolboy wearing ragged clothes, and is fully sapient. SCP-582-2 is an invisible humanoid entity that SCP-582-1 can summon at will. SCP-582-2 is not visible to the naked eye, but can be viewed through infrared cameras. SCP-582-1 is able to view invisible entities that cannot be viewed by humans. SCP-582-2 is not sapient but is sentient.
SCP-582-3 is a standard arrow similar to most arrows used by Native Americans, having a wooden shaft, wooden knock, feather fletchings, and a large, exaggerated arrowhead. The arrowhead is made of an unknown material, of which is similar in weight to gold. The arrowhead also has multiple gems, precious metals, and Egyptian text engraved in it.
Despite the arrowhead’s size and weight, the arrow is able to fly through the air like a normal arrow. If any sapient humanoid entity is wounded by SCP-582-3 in any way, whether it be a small cut or a deep wound, the humanoid entity will then transform into an instance of SCP-582-4. It is to be noted that holding SCP-582-3 by the shaft or the fletchings will not result any anomalous effects. SCP-582-4 has an ability similar to SCP-582-1. However, unlike SCP-582-1, SCP-582-4 will be outwardly aggressive towards humans, including SCP-582-1.
If SCP-582-1 comes into contact with an instance of SCP-582-4, it will become enraged and relentlessly attack SCP-582-4 using SCP-582-2 until SCP-582-4 has been terminated.
SCP-582-1 and SCP-582-4 both have great endurance and are able to withstand multiple severe wounds without ceasing their attacks.
Both SCP-582-1 and SCP-582-4 attack using their fists, attacking in a flurry of rapid punches. This flurry attack is able to quickly terminate any normal human.
SCP-582-4 pays no attention to any wounds, no matter how painful they might be to a normal human. Meanwhile, SCP-582-1 has great pain tolerance but will cease attacking if severely wounded at least █ times.
SCP-582-1 is very protective of SCP-582-3 and will not allow any humanoid entity to hold SCP-582-3 without it’s supervision. SCP-582-1 will advise humans to not wound themselves on the tip of the arrow, but will not actively prevent a person from doing so.
If SCP-582-3 is forcibly taken out of the line of sight of SCP-582-1, it will enter an enraged state and will use SCP-582-2 to break any obstacles or terminate any humans preventing it from reaching and retrieving SCP-582-3. Once SCP-582-1 retrieves SCP-582-3, it will return to a docile state. Testing results have shown that SCP-582-1 can remain in an enraged state for what is assumed to be indefinitely until it retrieves SCP-582-3.
If SCP-582-1 is unable to retrieve SCP-582-3, it will retrieve SCP-582-3 from [REDACTED]. The previous instance of SCP-582-3 will then [REDACTED].
If SCP-582-1 views any form of a vampire in any way it will enter an enraged state for █ hours. Likewise, if SCP-582-1 views any form of invisible entity or ghastly entity it will enter an enraged state for ██ hours.
