The Mark of Cain

After you spill the blood of the one you love most on the ground their blood seeps into a mile radius around the body. All creatures in the area besides you wither and die immediately. You are now immortal, you can no longer love anything, and you feel nothing. When you try to pick up a weapon your hand burns and you drop it no matter what and you gain disadvantage on all attack rolls. Everyone who attacks you always has advantage and when an attack hits it does double damage to the attacker.