SCP-073 appears to be a heavily-tanned male of Arabic or Middle Eastern descent in his early thirties. Arms, legs, spinal cord, and shoulder blades of the subject appear to have been replaced with artificial versions of unknown make and metal. SCP-073, who refers to itself as "Cain", is generally polite and genial to all who speak to it. SCP-073's presence is inimical to any and all life grown in soil, causing death to any such life within a twenty (20) meter radius. Violence directed towards SCP-073 reflects any damage inflicted on SCP-073 directly back onto the attacker, although SCP-073 visibly remains unharmed. This applies to any damage directed at SCP-073. When information concerning SCP-076 was brought to the attention of SCP-073 for "backing up", subject showed familiarity with the information, although was disinclined to adding to it, despite the fact that it stated that it already knew all about SCP-076. It then stated it would be better for all parties involved that it not meet SCP-076.
- SCP-073 is an invincible human.
- Touching or hitting SCP-073 will reflect the damage, killing the attacker. No damage can be done to SCP-073.
- Plants near SCP-073 vanish, such as grass, flowers etc.
- The only thing that is able to kill Cain is SCP-076
- SCP-073 is totally natural towards players.
SCP-073 is to be contained in a 6m x 6m x 3m containment chamber made out of reinforced iron. There must be a toilet also inside the containment chamber for SCP-073. Only personell with level 3 or higher clearance level may enter the containment chamber.