One New Mob Suggestion with New Two Horse Animal Crossbreeds

New Mob Suggestion:

Unicorn

Faster than a Donkey but Slower than a Horse but it can fly around like much an elytra
and doesn't need to be repaired like elytra everytime using it's fly ability and it spawns only Exclusively in Mythical (Fairy) Forest and Jungle Biome. 

Breeds:

Mule (Already Existed)

A cross breed between the Horse and Donkey, it can be used as a pack animal as it have an ability to carry items and while having it's Horse parent's fast movement speed advantage. 

Horicorn

A cross breed between the Horse and Unicorn, it has an ability to fly around like the unicorn while having it's Horse parent's fast movement speed advantage (faster than it's unicorn parent and it has same speed as it's horse parent) this breed cannot be used as a pack animal and does not have ability to carry items with it.

Donicorn

A cross breed between the Donkey and Unicorn, it has an ability to fly around like the unicorn and can be used as a pack animal at the same time while having the flying ability, this breed have the ability the carry item with it, it's movement speed doesn't change that much although it will improve a little to match it's unicorn parent's speed.