A while ago I modified the Undead Players Module to collect

Graves Module
your Items. Pepole said to: Separate it, get rid of the hopper, don't delete ground and make it an item players have to keep on them. So I did that:

Grave
Q: Why don't you just use keepInventory true?
A: keepInventory will also save your XP and you will not drop armor and sword, which s big part of Undead Players Module
Download: .schematic | world
Credit: TheAl_T, Planet Minecraft