just take the whole description
SCP-4109 is a vaguely humanoid entity about 6 feet tall, pitch black, and of unknown origin. SCP-4109 has the ability to manipulate its own being along with other beings and can instantly travel to any area under 150 lux (equivalent to a very dark day) within a 5 meter radius. SCP-4109 has also been observed to have a weakness to ultraviolet radiation but does not seem to be affected by physical harm and does not require any sustenance(see Test 4109-1-a). when SCP-4109 comes in physical contact with subject, the subject then becomes SCP-4109-1, and the transition period takes roughly 2 minutes and is very painful to SCP-4109-1. in that time, SCP-4109-1 is put in a state of molecular instability and is extremely sensitive to physical contact. if physical contact is made with SCP-4109-1, the process of transformation is either halted, reversed, or the subject experiences complete cellular death(see incident 4109-1) depending on the state of transformation. SCP-4109 shows little sign of interaction with test subjects other than the transformation process and is yet to be considered violent or docile.
changed the description to try to make it more clinical and less instant murder monster. any suggestions?