mahou tsukai no sprunki season 1 episode 2 Gray is now a warrior?

at the beautiful summer, Wenda, Gray and Mako going to the beach on a summer vacation. but they have seen Durple - the sprunki of kind, Wenda wanted to imagine Durple. but suddenly... Durple is from Dragonia! Wenda really wanted a beach accidentally Wenda has throw up Durple into the sea! black has came to the beach, mako gave for Gray sprunki watch and BOOM! Gray us now a magical warrior of freedom! how they'll defeat black?!