Mob Fusion is a rare phenomenon where two lifeforms get too close to eachother, and merge into one! To fuse two mobs, just get them close enough to eachother.
Dropped by enderman/skeleton crossbreed.
Reinforced Enderman Scale:
Crafted using 1 Enderman Scale and 2 Iron Ingots.
Enderman Scale armor:
Strongest armor in the game. When worn, you are invincible, but the lower the durability it has the less it will protect you. At some point the durability will be low enough to make you vulnerable again. Crafted using Reinforced Enderman Scales. All armor pieces have 1024 durability.
Milk a cow/squid crossbreed to get fresh, delicious calamari stew!
Morbid Harvester Arm
Besides from #xp4lief, the Morbid Harvester boss also drops his own arm when killed. Just like him, it does +40 attack damage ? a weapon worth going after him for!
Yes, some of them are now craftable.