  "Larris Oakton, the King of Slytherin, showed me the spell. It's meant to be wordless but Dumbledore doesn't tell people that so he looks cooler sending the spell out in front of the school. Larris told me that if Slytherin ever loses, unjustly, I'm meant to send the spell at the Gryffindor banner," Harry spoke giddy and both Hermione and Ron shared his excitement.