New Mob Ideas

Bosses
(The Wither Now Can Only be Created in the Nether)

(The Ender Dragon Shoots Ice)

Demon: The Demon is a boss that is the complete opposite of the Wither, it is made from Angel Dust and Devil Skull. In the Aether.

Kraken: The Kraken is a boss that spawns next to Sunken Ships, it shoots out lazers like Guardians. It shoots Blindness.

Hostile Mobs
Scorpion: The Scorpion is a mob that is the desert version of a spider, it is 2x smaller and shoots Poison.

Mummy: The Mummy is a mob that is the desert version of a zombie, it is wrapped in Sand Paper.

Frost: The Frost is the Aether version of a Blaze, it is immune to Fire Balls.

Devil Skeleton: The Devil Skeleton is the Aether version of a Wither Skeleton.

(NEUTRAL) Angel Pigman: The Angel Pigman is the Aether version of a Zombie Pigman, it is neutral.

Frost Cube: The Frost Cube is the Aether version of a Magma Cube.

Ghost: The Ghost is the Aether version of the Ghast, it shoots Snow Charge.

Shark: The Shark is a mob that spawns in Deep Oceans, they are most likely to be found in Fish Groups.

Dolphin: The Dolphin is a mob that spawns in Deep Oceans, they are most likely to be found in Fish Groups.

Crocodile: The Crocodile is a mob that spawns in the Savannah Swamps.

Human: The Human is a mob that spawns in the Overworld and is hostile automatically.

Passive Mobs
Fish: The Fish is a mob that spawns in any waters and when killed they drop fish.

Bird: The Bird is a mob that spawns in all Biomes and when killed it drops Raw Bird.