Reason how did mark creath became monster? When he was 7 Year old, He's been a long time, long time, long time. He loses his family that their parents died because a reason is MURDERED. Mark creath feels sad and getting for revenge who did it, Mark creath grows up and came to the experiment lab it's cristen. He was experiment with alot of teeths growing on the mouth and bodies. ≛≛≛≛≛≛≛ Gender: Male "Cristen experiment him.. "