How to use the Severed Hand in Resident Evil Requiem

The Severed Hand is a bit of a mystery in Resident Evil Requiem. After you escape the basement, you can pick this item up off the floor in front of the elevator where it was sliced from The Girl when the lift dropped. You're likely wondering what the hell you're supposed to do with it, since its description merely states that "It's still a little warm". Gross.

You've likely examined it all over, too. Well, the good news is it does have a function, though this creates another mystery versus resolving anything.