The Sand Demon and the Masked King (S04E02)

Joker and Hachi are in the desert looking for more clues about the ancient treasure. They happen to run into Queen, who is looking for a treasure called the Pharaoh's Mask. It turns out this is a royal desert controlled by the pharaoh, who has used magic to transfer his soul into the iron mask and take over the body of any who wear it! What's more, he's decided to make Queen his new host! Can Joker save Queen and find a new clue to the location of the Ancient Treasure? (Crunchyroll)