What's the reward for reaching the highest level on the Hill?

I've reached the highest level on the Hill. The rewards are: An 8-level Hill, 2 Sapphire Mystery Egg Nests, 2 Roc Egg Nests, 5 Roc Eggs, and 5 Puddles. Even though it's a Hill, farming it to the max level gives Puddles instead of Topsoil. I'll make them into bubbles that take up 4 spaces and save them for when I need them during the Mushroom Rush later, haha.