__NOTOC__{{Weapons|image= [[File:Mark of Cain.jpg|400px]]|name= The Mark of Cain|Manufacturer= [[God]]|Powers= Source of power for [[The First Blade]].<br>Lock and Key to [[The Darkness|The Darkness's]] cage|location= Taken by [[Amara]]|episodes= '''First Appearance:''' [[9.11 First Born]]<br>'''Last Appearance:''' [[11.23 Alpha and Omega]]}}
{{Quotation
|title=
