The 12 Days of Christmas - Day 4
In the post today, one member of every wizarding household receives a note bearing nothing but this rune. It is delivered by a blackbird.
Runes experts - the rune is unidentifiable, but what you can determine is that it is very, very old.
Those who have access to the Lucy Elkins murder files or had visions about her death or had a hand in her death will recognize it as one of the runes that was painted on the building where she was found.
Once you have seen the rune, the paper will dissolve and a message appears in the air that reads "Your True Love" and then fades away, just as it has every day.