UPDATE TWO - CHAPTER ONE: THE JUNKYARD 

ADDITIONS:

-Added the Hive Detector. A block that emits a redstone signal whenever the hivemind takes damage. This is global, and applies all over the world.

-Added the Spiked Bat weapon. A brittle but powerful bat with a special move.

-Added the Clawed Spear weapon. A brittle but deadly spear that can pierce and swipe.

-Added Demogorgon drop loot, Demogorgon teeth, flesh and claws.

-Added a demo for Will Byers' powers for an upcoming update. Can be used by typing /vmax true while the player as psychic powers.

-Added a host of new advancements.

-Added the ability to place a gate entity on walls.

-Added a "decay" system where normal overworld tools will rot away in The Upside Down, Upperdark and Underdark. This makes them less effective, but can be reversed by standing in water with the item equipped.

-Added the ability to use Demogorgon flesh to 'reinforce" armor in an anvil.

-Added the ability to burn living tendrils in your hand to distract the hivemind.

-Added string lights, functioning as decorations and as wall redstone.

-Added localizations of the flashlight's name for British and Australian English. 

-Added blocks above a tunnel rotting. Grass becomes dirt, crops decay, etc.

-Added rotten pumpkins. Which spawn when a pumpkin is placed above a tunnel.

-Added lore and tutorials for every item in the mod for new players who may be confused.

-Added a cloth mask that, when worn, stops the player from contracting Upside Down Sickness.

CHANGES:

-The hive mind now entirely loses sight of the player if they hide for long enough or if a Demogorgon or Demodog is sent to attack the player but fails to find them. 

-The /mindflayer status command now shows a distance count from the last location the Mind Flayer assumes the player is.

-Compasses now display if it's tracking a gate and where said gate is.

-Changed diagonal vines to not connect to straight ones instead of the strange visual of forcing a "normal" type vine as a border.

FIXES:

-Demogorgons and Demodogs now make less noise when in a large group. Making large groups and The Abyss less overstimulating.

-The gates now make noise less.

-Normal lightning now no longer makes the red lightning sound.