Per 
[[insert level 5 identification password]]
[[password received]]
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[[For Level 5 and above eyes only]]
Item #: SCP-6666
Object Class: Euclid
Special Containment Procedures
SCP-6666 is to be kept within a 2.4x2.4 metre steel room, no ventilation of any sort is to be permitted within the cell. The door is to be made of a thick titanium alloy and is to not allow any room beneath or around it for air to enter or escape. Door is to be locked and bolted at all times.
Description
SCP-6666 appears to be a humanoid male of approximately 18 but is theorised to be much older. The subject wears a thick grey trench coat and purple scarf, a puppets mask is worn upon the subjects face and does not appear to be removable. The subject has been known to shift its form on occasion to match something that its prey may take as friendly due to this information it is theorised that the beings true form has not yet been observed.
During a routine test on SCP-6666, the D-Class discovered the entities true form describing it as a [REDACTED] of about [REDACTED] metres tall, seen to be hunched over due to its immense height see Addendum-6666-1. When asked about what it is SCP-6666 states simply and often frustratedly that it is the [REDACTED] upon further questioning it simply states that there was not just four but actually five [REDACTED].
SCP-6666 has been observed to shift into a black cloud of smoke varying in size depending on what the anomaly’s objective is. Upon faced with a hostile D-Class subject the anomaly will begin to attempt to persuade the subject with fanciful words into being calmer and less hostile before wrapping the subject in [REDACTED] allowing SCP-6666 to possess them, see Addendum-6666-2. Upon being confronted with SCP-049 the anomaly has been seen to converse joyfully with SCP-049 until such time that SCP-049 is removed from the cell, see [REDACTED].
Addendum
Addendum-6666-1
D-Class 0768 entered the cell with immense caution seen to be fretting about what he may be approaching, upon being seen by D-Class-0768, SCP-6666 appeared to shift into an elderly gentlemen resembling what D-Class-0768 described as his Grandfather. D-Class-0768 appeared shocked at the sudden change in appearance of SCP-6666. SCP-6666 approached the D-Class personnel with interest, SCP-6666 was recorded saying: ‘You notice it? You are smart… wise… and yet… they will not believe you’ before turning and glaring into the camera. SCP-6666 turns back to D-Class-0768 and shifted again back into what appeared to be its usual form. The D-Class personnel was seen to suddenly back against the wall shrieking in terror and was recorded shrieking: ‘O Lord of Puppets be merciful upon me… O Lord above please spare my wretched soul… O Lord of Puppets spare me from thy wrath…’ before slumping to the ground suffering from a trauma induced coma. When D-Class-0768 awoke they described SCP-6666 as the [REDACTED] the fifth [REDACTED] and the controller of history. D-Class-0768 also described SCP-6666 as a large black demon with four large horns curling around its horse like skull, long wires hanging off its back and a large cloud of red mist hovering over it. D-Class 0768 has since been terminated by unexplained events.
Addendum-6666-2
