The Nether Update (also called The Ghast Update) is an update by Calico Elf
(New Boss) The Ghast King: The Ghast King is a giant Ghast sort of like the Ur Ghast but he has a giant crown on. His main attack is shooting fire balls and spawning Blazes or Ghasts but some times he'll rapid fire fireballs, make a trail of fire that is permanant until you kill him, or the rare headbutt and even rarer the pick up-throw where he picks you up and throws you. He has 400 health.
Elite Ghast: The Elite Ghast is a ghast with 30 hearts and when you kill it dudududududu it drops the same thing as a ghast.
Netherrack Crawler: A giant player shaped thing that is textured as Magma and burns you if you touch it but it only has 15 hearts.
Nether Worm: A giant boneworm that has 40 hearts and lives in lava. Does 4 hearts of damage. Can be tamed with fish.
Withered Bones: Drop off of Wither Skeletons.
Blaze Rune: A Weapon that has 15 durability and what it does is shoots fireballs
Hot Pocket: Ride a Nether Worm through The Nether
Lava Walker: Use the Obsidian Walker
Ghast Slayer: Defeat the Ghast King
The Middle: Slay Three Elder Guardians
Obsidian Walker: Turns Lava into Obsidian when you walk on it.