KinglyQueen

Completely diff SCP idea.
An SCP that only exists when contained. The SCP is a cat, and it's containment is simple; keep it in a locked space. In order to try and figure out the origins of the SCP, researchers speculate that someone had to have contained the SCP before them. They eventually find a missing cat poster that contains the SCP's appearance, and they go to investigate. The ex-owner tells them they got the cat from someone else, who got it from someone else, who got it from someone else, who got it from someone else, who gives them the address of the shop they got the cat from. The address is the same as the SCP foundation site that SCP-XXXX is being contained.

Revision possibility
Instead of below, it is a metallic green, alligator necklace.
Testing against D class show that the necklace reacts to harm enacted against the wearer. The more harm done against the wearer, the more the necklace reacts. Finally, a d class wearing it suffers lethal damage. The necklace tightens minutely, and the d class survives without harm. Once the necklace was removed, however, lethal injuries resume damage and the test subject dies.
A separate, unnamed SCP escapes. During this time, a researcher of the SCP is fatally injured, and just manages to go back to save herself via using SCP-XXXX. Researcher finds a temporary hiding spot as the efforts to recontain the SCP are underway. She begins taking recordings of how she feels wearing the necklace, stating feelings of power, confidence, and assurance that no matter what, everything will be okay. She decides to keep the necklace, and erase evidence that she is the one who took it.
This is not explicitly noted at first, only revealing that the necklace is missing after the video monitoring was "blown out" during the breach.
Several weeks pass. Investigation has failed to produce the missing necklace. Meanwhile, researcher in question has been repeatedly reported for strange behavior and reckless endangerment of the self. Direct action is finally taken when researcher is reported for exhibiting signs of severe medical distress accompanying a distinct, foul odor.
Researcher reacts with hesitant compliance when brought in for questioning. When it is stated that researcher will be reviewed by the medical staff, researcher grows irate and aggressive. It is determined that force is required to restrain the researcher, and it is revealed during this time the extent of the researchers horrific injuries, and where the missing necklace has gone.
Everyone immediately grows terrified at her state of being. The necklace is now shown to be extremely tightened, digging in halfway to the center of her throat.
Growing desperate, the researcher attacks. Stationed guards begin to shoot at her. She doesn't seem to immediately notice the new additional injuries, but it is clear to everyone else as parts of her body are ripped away by the force of the bullets. The necklace continues to tighten and tighten, until eventually she is decapitated. The researcher is finally deceased.
Final amendments are made in recent light of the full capabilities of the necklace.

SCP idea
An object that appears to be a worn out toy of sorts, reptilian in appearance with a cartoonishly oversized head. Its maw is open and lined with numerous pointed canines, and the throat seems to lead into a hollow interior.
Objects/items/things of desire or need appear in the maw of the toy, usually when a human passes by it. These things tend to be objects that the individual needs in the moment, but can also be objects that humans in general highly covet.
This tempts the human to reach for the object with their hand. 60-70% of the jaws of the scp will snap shut and remove the hand at the wrist. The occasional instances where it does not seems to provoke individuals with a higher risk of gambling to reach for the objects that appear in the scps mouth.
The scp does not seem capable of movement.
All attempts at forcing the mouth of the scp shut have proven infeasible. The scp's solidity refute force, and attempts to force the mouth shut have seem to provoke the scp into summoning objects to counteract the attempt. (example, acid pools out from the mouth, an angry swarm of wasps fly out, etc)
Humans seem to be lured to the scp after successfully retrieving the object. The chances of being lured back seem to increase among those who heard of the scp and initiated contact first by asking for something specific, and getting it with success.
WIP below.
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Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures:

Description: SCP-XXXX is a green statue or toy in the shape of an alligator standing roughly 0.61 meters tall. It is internally hollow, appears to be made of ceramic, and has an enlarged head that makes up half its total height. The most notable feature of this entity is its opened mouth, which contains two rows of sharpened teeth that many observers have claimed to be more "realistic" than the otherwise more "cartoonish" depiction of the alligator. Despite the ceramic nature of the statue, the teeth appear to be rusted over, and an analysis of the materials composing the teeth have revealed them to be made of metal.

The internal space of the mouth is otherwise completely hollow and devoid of the chipped paint that coats the exterior of the statue. The throat trails off into the abdomen, which is theorized to be the main containment of all objects spawned by SCP-XXXX, yet all attempts at observing the inside of SCP-XXXX with any means of light have failed.