I was thinking could we add more mythical creatures to the eggs?
Eg:
Dragons with the ability of crop size and mutation 3 to go along with the bee and butterfly
Unicorns
fairy's
With the abilities to match older pets but with highers abilities.
Or maybe make it a new egg entirely!
You could also add a new colour change ability so you already have rainbow and gold maybe add one called onyx/obsidian- so it blacks out or shadows the crops to add a gothic style to it ?
Or moonlight so it gets a white pearlesant glow/colour to it maybe.