Zeph is a Zephyrosaurus. It was Zoe's third Creature.
His fossil, along with the Emerald Garden tablet, was made into a table some time before the show started. Then, the table was shipped to a hotel in Transylvania, staying underneath a tree for a while. When a branch fell on the table, he was activated. He first fought Sister in episode 7.
Emerald Garden (DKFH) - This was first used to counter Sister's Volcano Burst.