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A sample of SCP-XXXX crystals

Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures: SCP-XXXX is to be kept in a sealed, locked, steel made container having its air temperature between 5 and 55 degrees Celsius. If any personnel enters SCP-XXXX container without Level 4 authorization, security guards are allowed to use brute force against the non-authorized person. SCP-XXXX is to be under video surveillance at all times by no fewer than four (4) personnel. If SCP-XXXX tries to breach its containment, a Level 4 personnel should lower the containment chamber's air temperature to zero (0) degrees Celsius or less.

Description: Discovered on the city of ██████, Brazil, at July the 5th, 02:04:55 AM, 19██, SCP-XXXX is an Euclid class creature of unknown origin that resembles an human body made of a mixture of between different types of macrocrystalline quartz, such as smoky quartz, and diamonds. SCP-XXXX can regenerate itself if it loses a part of his body. The creature has two (2) meters in length and is animate and extremely hostile. Tests released by the foundation's scientists showed that SCP-XXXX moves in a speed of ten (10) to seventy six (76) kilometers per hour (km/h). SCP-XXXX gets week if air temperature is under ten (10) degrees Celsius. If air temperature is lower then zero (0) degrees Celsius, SCP-XXXX will not be able to move. When any creature is in SCP-XXXX line of sight, it runs towards the seen creature. When SCP-XXXX reaches it, it stabs with its crystal, sharp edge claws until the creature dies. If SCP-XXXX isn't capable of reaching the seen creature, it starts producing a loud sound that ranges from one hundred seventy three (173) to two hundred seventy eight (278) decibels (dB) through an unknown way, since the experiment doesn´t show signs of having an oral cavity or vocal cords.

Addendum XXXX-1:
On 30/04/20██, Dr. █████ tried to enter SCP-XXXX container with Level 4 authorization to collect some of its crystals for studies. When the said scientist got in SCP-XXXX line of sight, the creature started to move fast towards the personnel and stabbed his chest multiple times, causing serious damage to the scientist. The experiment had also realized that the door of its container was opened and tried to escape, but one of the personnel present in the chamber's control room lowered the air temperature to minus ten (-10) degrees Celsius and made the creature freeze. Dr. █████ went through multiple surgeries, but happened to die.