When the character dies from a mob or drowning or falling or whatever the reason they should be teleported to a land of the dead where theres aa light fog on the ground and the whole place is a huge graveyard filled with new mobs called the reapers and ghosts and zombie gaurdians to kepp out the living, the whole place would also have crypts with coffins and chests and skeletons and loot. and if the player wanted to return there would be something like a ender portal which sends you back to your spawnpoint, and the backround for the place instead of sky would just be pure blackness there would also be a boss called the grim reaper (minor boss could possibly be herobrine....)