Per 
The blood sample should be yellow
Item #: SCP-XXXX
Object Class: Keter
Special Containment Procedures: SCP-XXXX-1 to 12 , SCP-XXXX-1 to 11 , SCP-XXXX-1 to 14 , SCP-XXXX-1 to 1█ are to be contained separately into site-137-A fully hand crafted cells. Food delivered to SCP-XXXX-1 to 1█ needs to be hand made by class-B personnel team ESCA. Once per week, one (1) class-D personnel is required to enter each specimen cells for blood testing. WARNING The personnel entering SCP-XXXX-1 to 1█ containement cubicule has the obligation of being naked or has to wear hand crafted clothes, plus, the seringe is to be non-made by any industry or company (SCP Foundation products apply). Entering anything but the specified items in SCP-XXXX-1 to 1█ cells is NEVER to be done.
Blood is to be immediately delivered to site-137-C were it will be analysed. If communication from site-137-C decleares that a blood sample is red the FLAVUS1 protocol is to be initialised immediately.
Description: Looking like any other persons these specimens are indistinguishable from humans. The only way to indentify them is by the color of their blood, which is yellow. Despite this information their blood will still look red for all humans affected by SCP-XXXX reality alterations. WARNING all humans are considered affected if they are not in reality alteration protection zones (RAPZ). These humanoïdes called pseudonymes have the property of modifiying the reality state of objects or concepts by touching them.2 This altering property is always negative, modifiying our reality so the object touched becomes useless or even dangerous. The risk in SCP-XXXX situation is their numbers and their positions, which can't be known by the SCP Foundation. Because of this uncertainty it has been judge by O5-██ council member that this situation will possibly lead to a VK-class end-of-the-world scenario. By slowly changing the world in imperceptible ways the pseudonymes may alter so much of our reality that everything in it becomes anomalous, dangerous or are simply going to break the reality as we know it. In a case of reality break it is also possible that SCP-XXXX entities cause a ZK-class end-of-the-world scenario.
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