HARRY POTTER Heat Changing Latte Mug - Voldemort. Perfect gift for every fan of the world of witchcraft and wizardry. Cold, the mug shows the Avada Kedavra spell - the Killing Curse - and Voldemort's Dark Mark. When hot liquid is poured in, the mug transforms to reveal Lord Voldemort himself casting the spell. Once the drink is finished the mug returns to its original state as it cools. A perfect gift choice for a true Harry Potter fan.