The Secret Veldt Alley is the third secret level in the Game.
2. Don't merge the skull and bones at all since they have a chance to drop chests if you harvest them. So you can merge 5 chests and have more chests to increase your chances of getting eggs from chest. I was able to merge 5 level 2 chests from the extra chests given from the skull and bones.
3. Open the chests and tap the stars after you run out of skull and bones. If you get a 5th grass dragon egg or 2 rock or 2 spotted dragon eggs then you'll have enough for all 3 stars.
a. If you don't get enough eggs then don't merge the rock dragon eggs and skip to 5.
5. If you're unlucky then harvest the stones until more chests and/or egg chests/vaults drop. The egg chests will drop rock dragon eggs so if you didn't merge the rock dragon eggs then you'll only need 2 egg chests. Done.