SCP-427 is a small, spherical, ornately carved locket made of a polished silver material. The ornate carvings do not seem to serve any function; it is unknown whether SCP-427's outer casing was crafted by sentients or not. Its circumference at its widest point is roughly 3 cm.
SCP-427 was created after placing a pill of SCP-500 in the Input booth of SCP-914 and using the Fine setting. It displays no unusual activity when closed. When opened, a small glowing orb is visible at the center. The orb emits no radiation or energy aside from the visible spectrum.
When SCP-427 is opened and exposed to biological tissue, it rapidly regenerates cellular damage and somehow is able to purge invading compounds or infections. As a standard of measure, the common cold takes 3 to 10 days to be worked through the human immune system and eventually removed. In the presence of an opened SCP-427, this time is reduced to 2 to 4 minutes. Its healing abilities are directional, so anything not in line of sight with the central orb experiences no effects.
However, long-term exposure produces a significant health hazard. As the locket heals damage, it optimizes the body's natural systems. Resistance to disease and toxins is increased by 500% compared to accepted LD50 or death-rate values after a total of 10 minutes of exposure, and 1000% after 15. After 15 minutes of exposure, muscular systems begin optimizing, increasing strength and pain tolerance by 200-300%. All other systems continue to optimize. Class-D personnel exposed to the device for over an hour total began mutating into a shapeless mass of tissue. The conversion time accelerates with continued exposure to SCP-427.
True to the source material, SCP-427 can be reproduced by placing an SCP-500 pill into SCP-914 with the setting on "Fine". When worn, the stamina gauge drains slower and replenishes faster, and the player gains increased movement speed.