Nimbus Egg
The Nimbus Egg is a permanent egg located in Sky Island. It costs 
5M for a single hatch, 15M for a x3 hatch, and 40M for a x8 hatch, and contains 5 pets.
List of Pets
The Nimbus Egg contains the following pets:
Piggy (Common)
Bird (Common)
Bee (Rare)
Butterfly (Epic)
Firefly (Legendary)