Bad Wolf
From Jenny Everywhere Wiki
In one universe, after the Bad Wolf incident, Rose Tyler ceased aging, although she only noticed it many years on, after she had become separated from the Doctor for what she thought was forever. (PROSE: Shifting)
In another universe, “Bad Wolf” was graffitied on a wall in an ordinary street where the Twelfth Doctor once parked his TARDIS. (PROSE: Ace Rules OK!)