SCP 682. The Hard-to-Destroy Reptile.

SCP-682 is a large, vaguely reptile-like creature of unknown origin. It appears to be extremely intelligent and was observed to engage in complex communication. SCP-682 appears to have a hatred of all life.

Termination Attempt with SCP 113.

SCP 113 was pressed against 682's claws by a D-class, who was killed soon after. SCP 682 began to shrink and change after entering stage 3 of 113's cycle. Once the changes were complete, traditional firearms were fired on 682. 682 developed a hard carapace once again and the bullets failed.

Post transformation, SCP 682 appears to be a 16-year-old caucasian girl with black hair, a lizard tail and lizard-like yellow eyes. With slight reluctance, 682 agreed to wearing clothing. A simple green T-shirt and denim shorts. 682 is yet to return to her original form. 682's hatred of humanity seems to have lessened. O5 council is considering allowing her to be moved to a humanoid containment cell once it's confirmed that 682 won't return her original form.