The Earth Dragon is a pet in the Ninjago Monastery. It can be tamed after completing certain missions in the Ninjago Monastery. 8 Imagination points and 10 Rockolate Bars from Johnny Umami are needed to tame the Earth Dragon pet. After it has been tamed once it will only cost 5 Rockolate Bars. Then, when you try a third time, there are no Rockolate Bars required to tame this pet.