Dumbledore Collapses and Requests Severus Snape

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Dumbledore collapses from the aftereffects of the potion he drank in the cave. Harry attempts to help him by suggesting they go to Poppy Pomfrey, but Dumbledore insists that only Severus Snape can help him. As Harry panics, trying to figure out how to get help, they are interrupted by Rosmerta (Three Broomsticks), who reveals the appearance of the Dark Mark above Hogwarts.