The landlord, it is verbena, verbena is a kind of herbal medicine, which can be soaked in lemon rose tea, which can play a slimming and beauty effect. At first, I knew verbena was slimming.

In The Vampire Diaries, verbena is a blind drug that can restrict vampires. Injecting vervain into vampires can make them incapacitated and weak in limbs. Humans can avoid hypnosis by taking vervain or wearing ornaments containing vervain. Vampires who eat blood containing vervain are injected with vervain.

I wonder if the landlord is satisfied with this answer?