Riddikulus!

"Riddikulus!" is the incantation for the Boggart-Banishing Charm from Harry Potter, used to make shapeshifting creatures called Boggarts (which feed on fear) transform into something humorous, thereby defeating them with laughter by making them appear comical and less frightening.

for me, my biggest fear is death, therefore in the presence of a Boggart, death reveals himself, but with the spell "Riddikulus!", i transform him into the fool he is, as you see him here...
the jester.