Mendseng is a magical herbal flower grown on Mount Dasharn in the kingdom of Wei-Ling. It can instantly end a flu when turned into a tea.
History
When Princess Jun caught the summer sniffles, making her miss opening the Festival of Kites, Wu-Chang claimed that the mendseng would help, but Emperor Quon was more interested in what his Advisor on All Things New thought.
Despite this, Princess Sofia urged Wu-Chang to take her and Prince Jin to retrieve the mendseng, which involved a great trek to Mount Dasharn.
When they got back to the royal palace, Wu-Chang mixed it into a tea and gave it to Jun, who temporarily glowed, curing her of the summer sniffles, which she would have had for several days if not. This impressed Emperor Quon, who was sorry that he doubted Wu-Chang.