And what if a player offes said Witch/Thief of blood who "appears" as someone they love and then deals with trauma and guilt every time they talk with their actual loved one. Or worse - if said loved one was already dead by the time they fight this blood player, or EVEN worse - the player believed that they were at fault for loved one's death and then they "actually" kill them - even if they know it is an impostor - blood player didn't even change shape, they just evoke the connection.
You wanna go devastating? We going to sob town today, bois.
A Witch of Heart manipulating someone’s significant other, and turning them against each other. Eventually when they are inevitably killed, the Witch continues manipulating their Soul and making it torment the other again and again.
Or a Maid of Heart ‘making’ a perfect replica of someone’s Soul, effectively bringing a deceased one back to life- Only for them to be taken away yet again. And again. And again.