The pendant contains the mixed blood of Dumbledore and Grindelwald. It is a magical totem, a blood pact, made between the two as young men, that prevents one from causing harm to the other. In Fantastic Beasts: The Crimes of Grindelwald , Newt Scamander\'s Niffler stole Grindelwald\'s pendant and returned it to Dumbledore. Made in base metal and presented in a four colour window box, this costume version of Grindelwald\'s pendant measures 72mm in height and 30 in width. It comes on a 660mm chain.