This ancient Transformation Temple has been opened for you to explore. Its very dangerous, so you can only send in one pet at a time and while the pet is inside the temple, you cannot trade or exchange the pet. Make sure you are prepared - the temple has many obstacles, 30 levels some say, but not many have made it all the way to the treasure deep inside! While inside the temple, your pet will notice many closed, locked doors while can only be opened with a special Key. Some doors even need several keys!
You will win either items, currency, pet stats or Account Upgrade Credit for completing each level. There is no time limit for completing a level but you can only complete one level every 24 hours. At level 30 you can pick a missing colour Transformation of your pet's current species. Here is the Prize List.