Graves are a form of storage, right?

Usage & Behavior

When a player dies, instead of dropping their items, they spawn a grave block at their death point. This grave can be broken to retrieve all of the items.

A grave shouldn't be a traditional inventory so they can't be interfaced with using hoppers.

If a player other than the one who died breaks a grave, a zombie with the killed player's head and a scythe will spawn.

Not really interested in adding this one anymore, but if there's demand for it I'll do it.