The Unicorn increases your chances of hatching twins or triplets. Place it right beside your fertilized eggs as they hatch and watch the babies multiply.

Good for knocking people and Dino's out.

Tame one and exchange their poops for things on official servers. It's literary a drogue which will make you see everything pink, then blue, then purple, and then you will travel to the candy mountain with the liopleurodon.

Oh hey they finally have an actual picture of the unicorn now rather than an equus