Per 
Item #: SCP-4308
Object Class: Euclid
Special Containment Procedures: SCP-4308 is to be kept in a 10m cube made from stainless steel, we are unsure of any unique abilities it might possess, so we will be working on upgrading the cage as we find these abilities. The cube is placed in a larger, 30m x 60m room with two guards stationed at all times. 2 cameras have also been placed in each adjacent corner.
Description: SCP-4308 is a thin, black vaguely-humanoid creature approximately 4.2m tall. It has very few facial features except for 2 round, white circles assumed to be eyes. SCP-4308's arms are very disproportionate from the rest of the body. The arms themselves are around 3.8m long with claws at the end. It has not been documented, so we have no clue what speed SCP-4308 can run at. Considering other SCP's run speed with a similar body shape, we can assume SCP-4308 can run from 20-45km/h and some of our top scientists started bets on what SCP-4308's speed is and we do not recognize these as actual test data. Later tests will determine SCP-4308's speed. SCP-4308 was captured on █/██/████ and has been kept ever since. We are unsure of SCP-4308's origins.
When tested, SCP-4308 is shown to be very playful. On one occasion, we released SCP-999 into SCP-4308's cage and both seemed to get along well. SCP-4308 has undergone multiple Class-D interactions. Out of the one interaction with D-8312, we are sensitive to putting another D-Class in there, but we did gain some valuable information about SCP-4308. We have not fully figured out any "special" powers SCP-4308 might have, but we can tell for sure that it seems to be comfortable in shadows, which unluckily we cannot see SCP-4308 when it does this, because the pigmentation on SCP-4308's skin has caused it to blend perfectly with the shadows, who knows if it's even there. When it goes into the corners, it closes its eyes, possibly sleeping or a self-defense tactic. After the test with D-8312, we have found out that SCP-4308 can █████ ██████ ███████████. Closer tests will be made soon and more interactions with Class-D and other SCP's will surely transpire.
Test A - █/██/███
Subject: SCP-4308
Procedure: This is SCP-4308's first interaction with anything, in this case, D-8312.
Results:
SCP-4308's cage has been moved to a secure location in the site, a larger cube (30m), and D-8312 is already in position in the new 30m cage. SCP-4308's cage is lowered and the new 30m cage has been sealed. We are about to remotely open SCP-4308's cage.
30 seconds later
SCP-4308's cage has been opened and it attempting to find a shadow in the area, none can be found. D-8312 approaches with caution, and when 5m away, sticks his hand out as if to tame SCP-8312.
D-8312, what are you doing?
Uh, I'm just trying to be nice to it, I guess?
Carry on, If you die its not our fault. *chuckling*
D-8312 continues to move closer, but slower.
Uh, hey?
SCP-4308 tilted it's head as if it understood what D-8312 was saying.
You… you can understand me?
SCP-4308 continued to tilt it's head and began slowly walking to D-8312.
D-8312, if you need to be pulled out, that can be arranged.
Uh, no. I'm good, I think it understands me, maybe?
We can see the same thing too y'know.
Oh, that's right.
SCP-4308 and D-8312 were now right next to each other. After a few seconds of silence and stillness, D-8312 began to move his hand to touch SCP-4308. After he did, he quickly ████ ██ ████ ██████ and SCP-4308 hurried to hide behind his old cage which was sitting in the middle of this new cage. SCP-4308 had to be removed by waiting until he went back into his old cage, which took 3 days.
Analysis:
SCP-4308 can █████ ██████ ███████████, curious about us (as humans), and seems to understand our language.
D-8312 made a full recovery from █████ ███████ ███.
